San Juan del Rio (Dge) Weather Records (MXN00022022)

Record envelope, standing records and threshold days for San Juan del Rio (Dge) (MXN00022022), Mexico, with 38 years of record.

Key Facts for San Juan del Rio (Dge)

San Juan del Rio (Dge) (MXN00022022) is a weather station in Mexico at 20.37 latitude and -99.98 longitude, 1,933 m (6,341 ft) above sea level.
The station reports from 1973 to 2010, 38 years of record.
1,464 records set at San Juan del Rio (Dge) still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
San Juan del Rio (Dge) tied a daily record high minimum temperature of 15.0 C (59.0 F) on 16 August 2010.

About the Station

Location: Mexico, 20.37 latitude, -99.98 longitude.
Elevation: 1,933 m (6,341 ft).
Period of record: 1973 to 2010, 38 years.
Eligible elements: tmax, tmin, prcp.

Daily Record Envelope and 2026

0 days at or beyond a record

The band shows the record high and record low for each calendar day at San Juan del Rio (Dge). The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.

Daily record high and record low at San Juan del Rio (Dge), with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	29.4 C (84.9 F)	-4.4 C (24.1 F)	n/a	n/a
Feb	31.7 C (89.1 F)	-5.0 C (23.0 F)	n/a	n/a
Mar	35.0 C (95.0 F)	-1.1 C (30.0 F)	n/a	n/a
Apr	36.7 C (98.1 F)	1.1 C (34.0 F)	n/a	n/a
May	38.9 C (102.0 F)	5.0 C (41.0 F)	n/a	n/a
Jun	36.7 C (98.1 F)	5.0 C (41.0 F)	n/a	n/a
Jul	35.0 C (95.0 F)	3.9 C (39.0 F)	n/a	n/a
Aug	36.7 C (98.1 F)	5.0 C (41.0 F)	n/a	n/a
Sep	32.8 C (91.0 F)	1.1 C (34.0 F)	n/a	n/a
Oct	32.8 C (91.0 F)	0.0 C (32.0 F)	n/a	n/a
Nov	30.6 C (87.1 F)	-1.7 C (28.9 F)	n/a	n/a
Dec	30.6 C (87.1 F)	-6.1 C (21.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at San Juan del Rio (Dge) still stand. 1993 holds the most, with 133.

Standing records at San Juan del Rio (Dge) by the year they were set
Year set	Standing records
1973	47
1974	49
1975	46
1976	68
1977	33
1978	27
1979	55
1980	55
1981	29
1982	32
1983	39
1984	28
1985	31
1986	36
1987	49
1988	41
1989	42
1990	38
1991	40
1992	28
1993	133
1994	26
1995	40
1996	23
1997	40
1998	48
1999	8
2000	54
2001	35
2002	45
2003	41
2004	18
2005	54
2009	68
2010	18

All-Time Record Progression

1 new records

1 all-time records were set at San Juan del Rio (Dge) between 10 January 2010 and 10 January 2010. Each dot is a new record.

Wettest Day of Each Month

Jul: 86.4 mm (3.4 in)

The wettest day on record for each calendar month at San Juan del Rio (Dge). The most was 86.4 mm (3.4 in) on 23 July 1973.

Record daily precipitation for each month at San Juan del Rio (Dge)
Month	Record daily precipitation (mm)	Date
Jan	32.5 mm (1.3 in)	23 January 1993
Feb	85.9 mm (3.4 in)	2 February 1992
Mar	38.6 mm (1.5 in)	12 March 1974
Apr	28.2 mm (1.1 in)	16 April 2002
May	49.3 mm (1.9 in)	4 May 1973
Jun	50.8 mm (2.0 in)	4 June 1975
Jul	86.4 mm (3.4 in)	23 July 1973
Aug	65.8 mm (2.6 in)	16 August 1984
Sep	78.5 mm (3.1 in)	1 September 2005
Oct	66.3 mm (2.6 in)	5 October 2001
Nov	25.7 mm (1.0 in)	27 November 2000
Dec	21.8 mm (0.9 in)	3 December 1979

Period of Record Coverage

1973 to 2010

35 years of record at San Juan del Rio (Dge), 1973 to 2010. 3 years have data for under 90 percent of days and are left out of rankings: 1993, 1999, 2010.

Days with data per year at San Juan del Rio (Dge)
Year	Days with data	Share of year	Complete
1973	334	92%	Yes
1974	364	100%	Yes
1975	334	92%	Yes
1976	365	100%	Yes
1977	365	100%	Yes
1978	362	99%	Yes
1979	365	100%	Yes
1980	366	100%	Yes
1981	365	100%	Yes
1982	365	100%	Yes
1983	365	100%	Yes
1984	365	100%	Yes
1985	364	100%	Yes
1986	364	100%	Yes
1987	365	100%	Yes
1988	366	100%	Yes
1989	365	100%	Yes
1990	364	100%	Yes
1991	350	96%	Yes
1992	362	99%	Yes
1993	323	88%	No
1994	365	100%	Yes
1995	365	100%	Yes
1996	366	100%	Yes
1997	365	100%	Yes
1998	362	99%	Yes
1999	59	16%	No
2000	363	99%	Yes
2001	363	99%	Yes
2002	365	100%	Yes
2003	364	100%	Yes
2004	335	92%	Yes
2005	365	100%	Yes
2009	335	92%	Yes
2010	243	67%	No

Latest Records

Latest records at San Juan del Rio (Dge)
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
16 August 2010	San Juan del Rio (Dge), MX	daily high min (Tie)	15.0 C (59.0 F)	tie	24 years	2 of 100 (Routine)
23 July 2010	San Juan del Rio (Dge), MX	daily low max (Tie)	20.6 C (69.1 F)	tie	9 years	1 of 100 (Routine)
20 July 2010	San Juan del Rio (Dge), MX	daily high min (Tie)	15.0 C (59.0 F)	tie	29 years	2 of 100 (Routine)
13 July 2010	San Juan del Rio (Dge), MX	daily high min (Tie)	15.0 C (59.0 F)	tie	31 years	3 of 100 (Routine)
12 July 2010	San Juan del Rio (Dge), MX	daily high min (Tie)	15.0 C (59.0 F)	tie	28 years	2 of 100 (Routine)
6 July 2010	San Juan del Rio (Dge), MX	daily rain	34.0 mm (1.3 in)	0.2 mm (0.01 in)	28 years	11 of 100 (Routine)
30 June 2010	San Juan del Rio (Dge), MX	daily high min (Tie)	15.0 C (59.0 F)	tie	27 years	2 of 100 (Routine)
27 June 2010	San Juan del Rio (Dge), MX	daily high max (Tie)	30.6 C (87.1 F)	tie	17 years	2 of 100 (Routine)
17 June 2010	San Juan del Rio (Dge), MX	daily high min (Tie)	15.6 C (60.1 F)	tie	19 years	2 of 100 (Routine)
13 June 2010	San Juan del Rio (Dge), MX	daily high min (Tie)	15.6 C (60.1 F)	tie	23 years	2 of 100 (Routine)
9 June 2010	San Juan del Rio (Dge), MX	daily rain	26.2 mm (1.0 in)	11.0 mm (0.4 in)	36 years	24 of 100 (Routine)
2 June 2010	San Juan del Rio (Dge), MX	daily high max	35.0 C (95.0 F)	1.1 C (2.0 F)	28 years	14 of 100 (Routine)
23 May 2010	San Juan del Rio (Dge), MX	daily high max	35.0 C (95.0 F)	0.6 C (1.1 F)	13 years	8 of 100 (Routine)
16 May 2010	San Juan del Rio (Dge), MX	daily low max	22.2 C (72.0 F)	3.4 C (6.1 F)	36 years	24 of 100 (Routine)
24 April 2010	San Juan del Rio (Dge), MX	daily high min (Tie)	15.0 C (59.0 F)	tie	19 years	2 of 100 (Routine)
29 March 2010	San Juan del Rio (Dge), MX	daily low max (Tie)	23.9 C (75.0 F)	tie	7 years	1 of 100 (Routine)
10 March 2010	San Juan del Rio (Dge), MX	daily high min	12.8 C (55.0 F)	1.7 C (3.1 F)	29 years	17 of 100 (Routine)
9 March 2010	San Juan del Rio (Dge), MX	daily high min	12.2 C (54.0 F)	0.5 C (0.9 F)	20 years	10 of 100 (Routine)
24 February 2010	San Juan del Rio (Dge), MX	daily low max	18.3 C (64.9 F)	0.6 C (1.1 F)	36 years	14 of 100 (Routine)
18 February 2010	San Juan del Rio (Dge), MX	daily rain	20.6 mm (0.8 in)	18.6 mm (0.7 in)	20 years	20 of 100 (Routine)

Climate Trend

27 complete years, 1974 to 2005

One stripe for each of 27 complete years at San Juan del Rio (Dge), 1974 to 2005. Blue stripes are years cooler than the station's own mean of 17.7 C (63.9 F); red stripes are warmer. The coolest year was 1976, at 15.7 C (60.3 F), and the warmest was 2005, at 18.9 C (66.0 F). The strongest colour marks a difference of 2.1 C (3.8 F).

Annual mean temperature at San Juan del Rio (Dge) as warming stripes, 1974 to 2005
Year	Annual mean temperature	Difference from the station mean
1974	16.0 C	-1.72 C
1976	15.7 C	-2.01 C
1977	16.4 C	-1.31 C
1978	16.8 C	-0.94 C
1979	16.8 C	-0.92 C
1980	18.3 C	+0.58 C
1981	17.8 C	+0.01 C
1982	18.6 C	+0.84 C
1983	17.9 C	+0.14 C
1984	17.6 C	-0.18 C
1985	17.5 C	-0.22 C
1986	17.4 C	-0.32 C
1987	17.8 C	+0.08 C
1988	17.4 C	-0.31 C
1989	17.7 C	-0.04 C
1990	17.9 C	+0.20 C
1992	17.1 C	-0.65 C
1994	18.4 C	+0.70 C
1995	18.6 C	+0.83 C
1996	17.8 C	+0.04 C
1997	17.8 C	+0.08 C
1998	18.8 C	+1.05 C
2000	18.0 C	+0.22 C
2001	18.7 C	+0.93 C
2002	18.8 C	+1.08 C
2003	18.6 C	+0.84 C
2005	18.9 C	+1.13 C

This station does not have enough complete years (30 are needed) to fit a temperature trend.

A year is complete when all 12 months have at least 20 days of both daily maximum and daily minimum readings. The annual mean is the mean of the monthly means. The trend describes this one station over this period; it does not say what caused the change.

Extremes by Year

1973 to 2010

Yearly extremes at San Juan del Rio (Dge): the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	38.9 C (102.0 F)	1993	35.0 C (95.0 F)	35
Coldest night (TNn)	-6.1 C (21.0 F)	1997	-1.1 C (30.0 F)	35
Wettest day (Rx1day)	86.4 mm (3.4 in)	1973	39.9 mm (1.6 in)	35
Wettest five days (Rx5day)	147.3 mm (5.8 in)	1976	76.7 mm (3.0 in)	35
Longest dry spell (CDD)	119 days	1996	63 days	35

Hottest day (TXx)

The hottest day of the year at San Juan del Rio (Dge), 1973 to 2010. The record is 38.9 C (102.0 F) in 1993, marked on the chart; the median year is 35.0 C (95.0 F).

Hottest day (TXx) at San Juan del Rio (Dge) by year
Year	Hottest day (TXx)
1973	33.3 C (91.9 F)
1974	35.0 C (95.0 F)
1975	35.0 C (95.0 F)
1976	31.7 C (89.1 F)
1977	31.7 C (89.1 F)
1978	33.9 C (93.0 F)
1979	32.8 C (91.0 F)
1980	35.0 C (95.0 F)
1981	33.9 C (93.0 F)
1982	35.0 C (95.0 F)
1983	36.7 C (98.1 F)
1984	34.4 C (93.9 F)
1985	33.9 C (93.0 F)
1986	35.6 C (96.1 F)
1987	33.3 C (91.9 F)
1988	33.9 C (93.0 F)
1989	35.6 C (96.1 F)
1990	35.6 C (96.1 F)
1991	35.6 C (96.1 F)
1992	31.7 C (89.1 F)
1993	38.9 C (102.0 F)
1994	37.8 C (100.0 F)
1995	36.1 C (97.0 F)
1996	34.4 C (93.9 F)
1997	33.9 C (93.0 F)
1998	37.2 C (99.0 F)
1999	30.6 C (87.1 F)
2000	33.9 C (93.0 F)
2001	36.7 C (98.1 F)
2002	37.8 C (100.0 F)
2003	36.7 C (98.1 F)
2004	33.3 C (91.9 F)
2005	35.0 C (95.0 F)
2009	35.6 C (96.1 F)
2010	35.0 C (95.0 F)

Coldest night (TNn)

The coldest night of the year at San Juan del Rio (Dge), 1973 to 2010. The record is -6.1 C (21.0 F) in 1997, marked on the chart; the median year is -1.1 C (30.0 F).

Coldest night (TNn) at San Juan del Rio (Dge) by year
Year	Coldest night (TNn)
1973	-2.2 C (28.0 F)
1974	-1.7 C (28.9 F)
1975	-2.2 C (28.0 F)
1976	-4.4 C (24.1 F)
1977	-2.2 C (28.0 F)
1978	0.0 C (32.0 F)
1979	-4.4 C (24.1 F)
1980	-1.7 C (28.9 F)
1981	-1.1 C (30.0 F)
1982	0.0 C (32.0 F)
1983	-5.0 C (23.0 F)
1984	-1.1 C (30.0 F)
1985	-2.8 C (27.0 F)
1986	-4.4 C (24.1 F)
1987	-2.2 C (28.0 F)
1988	-1.1 C (30.0 F)
1989	-4.4 C (24.1 F)
1990	-0.6 C (30.9 F)
1991	0.0 C (32.0 F)
1992	0.6 C (33.1 F)
1993	-0.6 C (30.9 F)
1994	-1.1 C (30.0 F)
1995	0.0 C (32.0 F)
1996	-1.7 C (28.9 F)
1997	-6.1 C (21.0 F)
1998	-1.1 C (30.0 F)
1999	-3.3 C (26.1 F)
2000	-1.7 C (28.9 F)
2001	1.1 C (34.0 F)
2002	0.0 C (32.0 F)
2003	-1.7 C (28.9 F)
2004	0.0 C (32.0 F)
2005	1.7 C (35.1 F)
2009	1.7 C (35.1 F)
2010	1.7 C (35.1 F)

Wettest day (Rx1day)

The wettest day of the year at San Juan del Rio (Dge), 1973 to 2010. The record is 86.4 mm (3.4 in) in 1973, marked on the chart; the median year is 39.9 mm (1.6 in).

Wettest day (Rx1day) at San Juan del Rio (Dge) by year
Year	Wettest day (Rx1day)
1973	86.4 mm (3.4 in)
1974	50.0 mm (2.0 in)
1975	50.8 mm (2.0 in)
1976	74.7 mm (2.9 in)
1977	44.2 mm (1.7 in)
1978	47.5 mm (1.9 in)
1979	36.8 mm (1.4 in)
1980	31.0 mm (1.2 in)
1981	51.8 mm (2.0 in)
1982	37.1 mm (1.5 in)
1983	49.3 mm (1.9 in)
1984	65.8 mm (2.6 in)
1985	55.4 mm (2.2 in)
1986	46.5 mm (1.8 in)
1987	37.6 mm (1.5 in)
1988	32.0 mm (1.3 in)
1989	30.0 mm (1.2 in)
1990	29.5 mm (1.2 in)
1991	24.9 mm (1.0 in)
1992	85.9 mm (3.4 in)
1993	35.8 mm (1.4 in)
1994	13.0 mm (0.5 in)
1995	55.9 mm (2.2 in)
1996	35.8 mm (1.4 in)
1997	39.9 mm (1.6 in)
1998	60.5 mm (2.4 in)
1999	6.4 mm (0.25 in)
2000	38.6 mm (1.5 in)
2001	66.3 mm (2.6 in)
2002	31.8 mm (1.3 in)
2003	37.6 mm (1.5 in)
2004	31.2 mm (1.2 in)
2005	78.5 mm (3.1 in)
2009	45.7 mm (1.8 in)
2010	37.1 mm (1.5 in)

Wettest five days (Rx5day)

The wettest five days of the year at San Juan del Rio (Dge), 1973 to 2010. The record is 147.3 mm (5.8 in) in 1976, marked on the chart; the median year is 76.7 mm (3.0 in).

Wettest five days (Rx5day) at San Juan del Rio (Dge) by year
Year	Wettest five days (Rx5day)
1973	124.1 mm (4.9 in)
1974	52.6 mm (2.1 in)
1975	105.2 mm (4.1 in)
1976	147.3 mm (5.8 in)
1977	90.7 mm (3.6 in)
1978	58.2 mm (2.3 in)
1979	74.7 mm (2.9 in)
1980	58.7 mm (2.3 in)
1981	82.5 mm (3.2 in)
1982	97.1 mm (3.8 in)
1983	89.0 mm (3.5 in)
1984	78.7 mm (3.1 in)
1985	78.3 mm (3.1 in)
1986	79.8 mm (3.1 in)
1987	62.2 mm (2.4 in)
1988	76.7 mm (3.0 in)
1989	74.0 mm (2.9 in)
1990	74.4 mm (2.9 in)
1991	84.9 mm (3.3 in)
1992	86.7 mm (3.4 in)
1993	53.6 mm (2.1 in)
1994	32.6 mm (1.3 in)
1995	62.3 mm (2.5 in)
1996	64.8 mm (2.6 in)
1997	63.3 mm (2.5 in)
1998	111.4 mm (4.4 in)
1999	6.4 mm (0.25 in)
2000	63.5 mm (2.5 in)
2001	106.3 mm (4.2 in)
2002	72.6 mm (2.9 in)
2003	119.1 mm (4.7 in)
2004	56.6 mm (2.2 in)
2005	88.8 mm (3.5 in)
2009	66.6 mm (2.6 in)
2010	99.3 mm (3.9 in)

Longest dry spell (CDD)

The longest dry spell of the year at San Juan del Rio (Dge), 1973 to 2010. The record is 119 days in 1996, marked on the chart; the median year is 63 days.

Longest dry spell (CDD) at San Juan del Rio (Dge) by year
Year	Longest dry spell (CDD)
1973	63 days
1974	68 days
1975	102 days
1976	38 days
1977	79 days
1978	40 days
1979	75 days
1980	56 days
1981	35 days
1982	61 days
1983	56 days
1984	85 days
1985	84 days
1986	52 days
1987	62 days
1988	58 days
1989	66 days
1990	71 days
1991	88 days
1992	63 days
1993	38 days
1994	96 days
1995	45 days
1996	119 days
1997	50 days
1998	77 days
1999	85 days
2000	63 days
2001	47 days
2002	56 days
2003	70 days
2004	59 days
2005	85 days
2009	75 days
2010	27 days

Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.

Rainfall Return Levels

32 years, 1973 to 2009

A day with at least 43.9 mm (1.7 in) of rain is expected about once in 2 years. A day with at least 105.1 mm (4.1 in) of rain is expected about once in 100 years.

Rainfall return levels at San Juan del Rio (Dge): the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	43.9 mm (1.7 in)
5 years	60.1 mm (2.4 in)
10 years	71.0 mm (2.8 in)
25 years	84.7 mm (3.3 in)
50 years	94.9 mm (3.7 in)	Longer than the 32 years of record
100 years	105.1 mm (4.1 in)	Longer than the 32 years of record

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 32 years of values from 1973 to 2009.

A return level is an estimate. It is least reliable for the long periods, 50 and 100 years, and for any period longer than the record behind the fit, where the fit has to reach past the largest day actually observed. It is not a forecast.

The largest wettest-day totals in the fit: 86.4 mm (3.4 in) in 1973; 85.9 mm (3.4 in) in 1992; 78.5 mm (3.1 in) in 2005.

Download the Data

Data for San Juan del Rio (Dge) standing records by year: CSV or JSON. Field meanings are on the data page.
Data for San Juan del Rio (Dge) threshold days by year: CSV or JSON. Field meanings are on the data page.

Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-17 (17 October 2026). Records are computed by this site and are not official.

Data as of 2025-12-31. Last revised 31 December 2025 (2025-12-31).