Berwyn Threshold Days by Year (CA003070640)
14 fixed thresholds counted per year at Berwyn (CA003070640): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Berwyn Thresholds
- Berwyn: days with a maximum temperature at or below 0 C (32 F) in 19 years, most in 1951 with 154.
- Berwyn: nights with a minimum temperature at or below 0 C (32 F) in 19 years, most in 1922 with 240.
- Berwyn: nights with a minimum temperature at or below -10 C (14 F) in 19 years, most in 1950 with 149.
- Berwyn: nights with a minimum temperature at or below -20 C (-4 F) in 19 years, most in 1935 with 87.
- 14 fixed thresholds have at least one qualifying day at Berwyn.
Days at or above 30 C (86 F)
16 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1921 | 1 | 5.4 |
| 1922 | 5 | 5.4 |
| 1924 | 7 | 5.4 |
| 1925 | 7 | 5.4 |
| 1926 | 8 | 5.4 |
| 1927 | 5 | 5.4 |
| 1928 | 5 | 5.4 |
| 1930 | 9 | 7 |
| 1931 | 5 | 7 |
| 1935 | 2 | 7 |
| 1936 | 5 | 7 |
| 1937 | 7 | 7 |
| 1938 | 13 | 7 |
| 1939 | 8 | 7 |
| 1950 | 5 | 3 |
| 1952 | 1 | 3 |
| Year | First date | Last date |
|---|---|---|
| 1921 | 1921-07-19 | 1921-07-19 |
| 1922 | 1922-05-31 | 1922-08-19 |
| 1924 | 1924-06-29 | 1924-07-25 |
| 1925 | 1925-06-27 | 1925-08-02 |
| 1926 | 1926-06-26 | 1926-07-24 |
| 1927 | 1927-07-23 | 1927-08-11 |
| 1928 | 1928-05-21 | 1928-07-28 |
| 1930 | 1930-07-12 | 1930-08-15 |
| 1931 | 1931-08-01 | 1931-08-18 |
| 1935 | 1935-07-22 | 1935-07-23 |
| 1936 | 1936-05-27 | 1936-05-31 |
| 1937 | 1937-07-12 | 1937-09-17 |
| 1938 | 1938-07-05 | 1938-09-18 |
| 1939 | 1939-07-10 | 1939-08-22 |
| 1950 | 1950-06-13 | 1950-07-25 |
| 1952 | 1952-07-30 | 1952-07-30 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 16 | 13 | 1938 | 1 |
| 35 C (95 F): Days | 2 | 1 | 1936 | 1 |
| 90 F (32.2 C): Days | 12 | 3 | 1924 | 1 |
| 0 C (32 F): Ice days (max | 19 | 154 | 1951 | 115 |
| 0 C (32 F): Frost days (min | 19 | 240 | 1922 | 199 |
| -10 C (14 F): Days with min | 19 | 149 | 1950 | 115 |
| -20 C (-4 F): Days with min | 19 | 87 | 1935 | 38 |
| -30 C (-22 F): Days with min | 19 | 43 | 1936 | 14 |
| -40 C (-40 F): Days with min | 14 | 11 | 1950 | 2 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 14 | 16 | 1953 | 13 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 11 | 5 | 1936 | 3 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 3 | 1 | 1931 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 14 | 7 | 1953 | 3 |
| 25 cm (9.8 in): Days with 25 cm or more snowfall | 1 | 1 | 1936 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1921.
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 (2026-10-17).