Nampa Weather Records (USC00106295)

Record envelope, standing records and threshold days for Nampa (USC00106295), Idaho, United States, with 59 years of record.

Key Facts for Nampa

Nampa (USC00106295) is a weather station in Idaho, United States at 43.58 latitude and -116.57 longitude, 756 m (2,480 ft) above sea level.
The station reports from 1893 to 1951, 59 years of record.
1,464 records set at Nampa still stand.
Records are tracked for no element yet: an element needs 30 years of data to be eligible.

About the Station

Location: Idaho, United States, 43.58 latitude, -116.57 longitude.
Elevation: 756 m (2,480 ft).
Period of record: 1893 to 1951, 59 years.
Eligible elements: none yet.

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 Nampa. 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 Nampa, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	16.7 C (62.1 F)	-27.2 C (-17.0 F)	n/a	n/a
Feb	21.1 C (70.0 F)	-23.3 C (-9.9 F)	n/a	n/a
Mar	26.7 C (80.1 F)	-12.2 C (10.0 F)	n/a	n/a
Apr	35.0 C (95.0 F)	-11.7 C (10.9 F)	n/a	n/a
May	36.7 C (98.1 F)	-3.3 C (26.1 F)	n/a	n/a
Jun	39.4 C (102.9 F)	-1.1 C (30.0 F)	n/a	n/a
Jul	43.3 C (109.9 F)	3.3 C (37.9 F)	n/a	n/a
Aug	41.7 C (107.1 F)	4.4 C (39.9 F)	n/a	n/a
Sep	40.0 C (104.0 F)	-3.9 C (25.0 F)	n/a	n/a
Oct	31.1 C (88.0 F)	-6.7 C (19.9 F)	n/a	n/a
Nov	22.2 C (72.0 F)	-26.1 C (-15.0 F)	n/a	n/a
Dec	17.2 C (63.0 F)	-18.3 C (-0.9 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Nampa still stand. 1896 holds the most, with 151.

Wettest Day of Each Month

Dec: 33.3 mm (1.3 in)

The wettest day on record for each calendar month at Nampa. The most was 33.3 mm (1.3 in) on 12 December 1948.

Record daily precipitation for each month at Nampa
Month	Record daily precipitation (mm)	Date
Jan	22.1 mm (0.9 in)	14 January 1896
Feb	12.7 mm (0.5 in)	5 February 1951
Mar	22.9 mm (0.9 in)	8 March 1943
Apr	29.0 mm (1.1 in)	27 April 1894
May	23.9 mm (0.9 in)	19 May 1894
Jun	17.8 mm (0.7 in)	7 June 1941
Jul	6.4 mm (0.25 in)	30 July 1944
Aug	12.7 mm (0.5 in)	11 August 1941
Sep	10.4 mm (0.4 in)	7 September 1947
Oct	14.0 mm (0.6 in)	11 October 1942
Nov	24.9 mm (1.0 in)	25 November 1896
Dec	33.3 mm (1.3 in)	12 December 1948

Period of Record Coverage

1893 to 1951

18 years of record at Nampa, 1893 to 1951. 7 years have data for under 90 percent of days and are left out of rankings: 1893, 1898, 1940, 1947, 1948, 1949, 1951.

Days with data per year at Nampa
Year	Days with data	Share of year	Complete
1893	20	5%	No
1894	361	99%	Yes
1895	363	99%	Yes
1896	365	100%	Yes
1897	336	92%	Yes
1898	212	58%	No
1940	85	23%	No
1941	357	98%	Yes
1942	361	99%	Yes
1943	359	98%	Yes
1944	363	99%	Yes
1945	345	95%	Yes
1946	360	99%	Yes
1947	283	78%	No
1948	222	61%	No
1949	281	77%	No
1950	349	96%	Yes
1951	220	60%	No

Latest Records

No records were set at this station in the latest data.

Extremes by Year

1893 to 1951

Yearly extremes at Nampa: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	43.3 C (109.9 F)	1942	40.0 C (104.0 F)	18
Coldest night (TNn)	-27.2 C (-17.0 F)	1898	-18.0 C (-0.5 F)	18
Wettest day (Rx1day)	33.3 mm (1.3 in)	1948	17.9 mm (0.7 in)	18
Wettest five days (Rx5day)	39.1 mm (1.5 in)	1894	28.5 mm (1.1 in)	18
Longest dry spell (CDD)	93 days	1943	40 days	18

Hottest day (TXx)

The hottest day of the year at Nampa, 1893 to 1951. The record is 43.3 C (109.9 F) in 1942, marked on the chart; the median year is 40.0 C (104.0 F).

Hottest day (TXx) at Nampa by year
Year	Hottest day (TXx)
1893	8.9 C (48.0 F)
1894	39.4 C (102.9 F)
1895	38.9 C (102.0 F)
1896	40.6 C (105.1 F)
1897	41.7 C (107.1 F)
1898	40.6 C (105.1 F)
1940	25.6 C (78.1 F)
1941	40.0 C (104.0 F)
1942	43.3 C (109.9 F)
1943	40.0 C (104.0 F)
1944	40.6 C (105.1 F)
1945	39.4 C (102.9 F)
1946	42.2 C (108.0 F)
1947	36.1 C (97.0 F)
1948	37.8 C (100.0 F)
1949	41.7 C (107.1 F)
1950	40.0 C (104.0 F)
1951	42.2 C (108.0 F)

Coldest night (TNn)

The coldest night of the year at Nampa, 1893 to 1951. The record is -27.2 C (-17.0 F) in 1898, marked on the chart; the median year is -18.0 C (-0.5 F).

Coldest night (TNn) at Nampa by year
Year	Coldest night (TNn)
1893	-9.4 C (15.1 F)
1894	-21.7 C (-7.1 F)
1895	-16.7 C (1.9 F)
1896	-26.1 C (-15.0 F)
1897	-12.8 C (9.0 F)
1898	-27.2 C (-17.0 F)
1940	-15.6 C (3.9 F)
1941	-10.6 C (12.9 F)
1942	-22.8 C (-9.0 F)
1943	-19.4 C (-2.9 F)
1944	-16.7 C (1.9 F)
1945	-18.3 C (-0.9 F)
1946	-11.1 C (12.0 F)
1947	-18.9 C (-2.0 F)
1948	-17.8 C (0.0 F)
1949	-21.1 C (-6.0 F)
1950	-23.3 C (-9.9 F)
1951	-16.1 C (3.0 F)

Wettest day (Rx1day)

The wettest day of the year at Nampa, 1893 to 1951. The record is 33.3 mm (1.3 in) in 1948, marked on the chart; the median year is 17.9 mm (0.7 in).

Wettest day (Rx1day) at Nampa by year
Year	Wettest day (Rx1day)
1893	1.8 mm (0.07 in)
1894	29.0 mm (1.1 in)
1895	18.0 mm (0.7 in)
1896	24.9 mm (1.0 in)
1897	17.8 mm (0.7 in)
1898	18.8 mm (0.7 in)
1940	12.7 mm (0.5 in)
1941	23.6 mm (0.9 in)
1942	14.0 mm (0.6 in)
1943	22.9 mm (0.9 in)
1944	17.0 mm (0.7 in)
1945	19.3 mm (0.8 in)
1946	10.4 mm (0.4 in)
1947	10.4 mm (0.4 in)
1948	33.3 mm (1.3 in)
1949	7.6 mm (0.30 in)
1950	15.2 mm (0.6 in)
1951	22.9 mm (0.9 in)

Wettest five days (Rx5day)

The wettest five days of the year at Nampa, 1893 to 1951. The record is 39.1 mm (1.5 in) in 1894, marked on the chart; the median year is 28.5 mm (1.1 in).

Wettest five days (Rx5day) at Nampa by year
Year	Wettest five days (Rx5day)
1893	2.0 mm (0.08 in)
1894	39.1 mm (1.5 in)
1895	22.1 mm (0.9 in)
1896	32.3 mm (1.3 in)
1897	31.3 mm (1.2 in)
1898	20.4 mm (0.8 in)
1940	28.2 mm (1.1 in)
1941	33.1 mm (1.3 in)
1942	28.7 mm (1.1 in)
1943	30.8 mm (1.2 in)
1944	27.2 mm (1.1 in)
1945	36.1 mm (1.4 in)
1946	14.0 mm (0.6 in)
1947	21.0 mm (0.8 in)
1948	35.8 mm (1.4 in)
1949	14.0 mm (0.6 in)
1950	31.8 mm (1.3 in)
1951	25.4 mm (1.0 in)

Longest dry spell (CDD)

The longest dry spell of the year at Nampa, 1893 to 1951. The record is 93 days in 1943, marked on the chart; the median year is 40 days.

Longest dry spell (CDD) at Nampa by year
Year	Longest dry spell (CDD)
1893	13 days
1894	31 days
1895	51 days
1896	33 days
1897	29 days
1898	31 days
1940	22 days
1941	31 days
1942	60 days
1943	93 days
1944	92 days
1945	53 days
1946	59 days
1947	44 days
1948	55 days
1949	31 days
1950	36 days
1951	55 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.

Download the Data

Data for Nampa standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Nampa 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 2026-10-12 (12 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).