Ajan Threshold Days by Year (RSM00031168)
13 fixed thresholds counted per year at Ajan (RSM00031168): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Ajan Thresholds
- Ajan: days with 10 mm (0.39 in) or more of precipitation in 92 years, most in 1961 with 45.
- Ajan: days with 25 mm (0.98 in) or more of precipitation in 92 years, most in 2009 with 22.
- Ajan: nights with a minimum temperature at or below 0 C (32 F) in 91 years, most in 1960 with 256.
- Ajan: nights with a minimum temperature at or below -10 C (14 F) in 91 years, most in 1952 with 174.
- 13 fixed thresholds have at least one qualifying day at Ajan.
Days at or above 30 C (86 F)
19 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1934 | 3 | 2 |
| 1935 | 1 | 2 |
| 1946 | 1 | 1 |
| 1949 | 1 | 1 |
| 1950 | 1 | 1 |
| 1954 | 1 | 1 |
| 1958 | 1 | 1 |
| 1963 | 1 | 1 |
| 1976 | 1 | 1.5 |
| 1978 | 2 | 1.5 |
| 1988 | 1 | 1 |
| 1990 | 1 | 1 |
| 2005 | 1 | 1 |
| 2006 | 1 | 1 |
| 2008 | 1 | 1 |
| 2010 | 1 | 1 |
| 2012 | 1 | 1 |
| 2015 | 1 | 1 |
| 2017 | 1 | 1 |
| Year | First date | Last date |
|---|---|---|
| 1934 | 1934-06-23 | 1934-08-01 |
| 1935 | 1935-07-03 | 1935-07-03 |
| 1946 | 1946-07-17 | 1946-07-17 |
| 1949 | 1949-07-14 | 1949-07-14 |
| 1950 | 1950-07-13 | 1950-07-13 |
| 1954 | 1954-08-08 | 1954-08-08 |
| 1958 | 1958-07-26 | 1958-07-26 |
| 1963 | 1963-07-25 | 1963-07-25 |
| 1976 | 1976-07-19 | 1976-07-19 |
| 1978 | 1978-07-25 | 1978-07-26 |
| 1988 | 1988-07-31 | 1988-07-31 |
| 1990 | 1990-05-26 | 1990-05-26 |
| 2005 | 2005-08-25 | 2005-08-25 |
| 2006 | 2006-07-17 | 2006-07-17 |
| 2008 | 2008-06-30 | 2008-06-30 |
| 2010 | 2010-08-26 | 2010-08-26 |
| 2012 | 2012-06-03 | 2012-06-03 |
| 2015 | 2015-08-25 | 2015-08-25 |
| 2017 | 2017-07-03 | 2017-07-03 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 19 | 3 | 1934 | 1 |
| 90 F (32.2 C): Days | 2 | 2 | 1934 | 1 |
| 0 C (32 F): Ice days (max | 88 | 191 | 1984 | 94 |
| 0 C (32 F): Frost days (min | 91 | 256 | 1960 | 116 |
| -10 C (14 F): Days with min | 91 | 174 | 1952 | 66 |
| -20 C (-4 F): Days with min | 91 | 108 | 1952 | 26 |
| -30 C (-22 F): Days with min | 61 | 12 | 1979 | 7 |
| 20 C (68 F): Tropical nights (min | 2 | 1 | 1934 | 1 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 92 | 45 | 1961 | 25 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 92 | 22 | 2009 | 8 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 82 | 8 | 1961 | 5 |
| 100 mm (3.94 in): Days with 100 mm or more rain | 29 | 3 | 1981 | 2 |
| 200 mm (7.87 in): Days with 200 mm or more rain | 1 | 1 | 1983 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1934.
Download the Data
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). Threshold counts are computed by this site.
Data as of . Last revised (2025-12-31).