Big Bear Lake Dam Threshold Days by Year (USC00040742)
15 fixed thresholds counted per year at Big Bear Lake Dam (USC00040742): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Big Bear Lake Dam Thresholds
- Big Bear Lake Dam: days with 10 mm (0.39 in) or more of precipitation in 30 years, most in 1938 with 34.
- Big Bear Lake Dam: days with 25 mm (0.98 in) or more of precipitation in 30 years, most in 1936 with 18.
- Big Bear Lake Dam: days with 50 mm (1.97 in) or more of precipitation in 29 years, most in 1936 with 10.
- Big Bear Lake Dam: days with a maximum temperature at or below 0 C (32 F) in 21 years, most in 1949 with 42.
- 15 fixed thresholds have at least one qualifying day at Big Bear Lake Dam.
Days at or above 30 C (86 F)
19 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1921 | 1 | 1 |
| 1934 | 5 | 2.8 |
| 1936 | 2 | 2.8 |
| 1937 | 2 | 2.8 |
| 1938 | 4 | 2.8 |
| 1939 | 1 | 2.8 |
| 1940 | 1 | 3.4 |
| 1941 | 1 | 3.4 |
| 1942 | 1 | 3.4 |
| 1943 | 4 | 3.4 |
| 1944 | 4 | 3.4 |
| 1946 | 3 | 3.4 |
| 1947 | 4 | 3.4 |
| 1948 | 7 | 3.4 |
| 1949 | 6 | 3.4 |
| 1950 | 11 | 7.3 |
| 1951 | 3 | 7.3 |
| 1958 | 3 | 7.3 |
| 1959 | 12 | 7.3 |
| Year | First date | Last date |
|---|---|---|
| 1921 | 1921-07-11 | 1921-07-11 |
| 1934 | 1934-07-12 | 1934-08-18 |
| 1936 | 1936-06-21 | 1936-06-23 |
| 1937 | 1937-08-11 | 1937-08-19 |
| 1938 | 1938-07-20 | 1938-08-01 |
| 1939 | 1939-07-21 | 1939-07-21 |
| 1940 | 1940-08-30 | 1940-08-30 |
| 1941 | 1941-07-21 | 1941-07-21 |
| 1942 | 1942-07-23 | 1942-07-23 |
| 1943 | 1943-07-26 | 1943-07-31 |
| 1944 | 1944-08-12 | 1944-09-07 |
| 1946 | 1946-08-02 | 1946-09-13 |
| 1947 | 1947-07-18 | 1947-09-01 |
| 1948 | 1948-06-29 | 1948-09-03 |
| 1949 | 1949-07-15 | 1949-08-07 |
| 1950 | 1950-06-30 | 1950-09-02 |
| 1951 | 1951-07-14 | 1951-08-15 |
| 1958 | 1958-07-13 | 1958-08-11 |
| 1959 | 1959-06-22 | 1959-08-31 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 19 | 12 | 1959 | 12 |
| 90 F (32.2 C): Days | 4 | 3 | 1950 | 3 |
| 0 C (32 F): Ice days (max | 21 | 42 | 1949 | 12 |
| 0 C (32 F): Frost days (min | 20 | 267 | 1951 | 176 |
| -10 C (14 F): Days with min | 20 | 101 | 1952 | 9 |
| -20 C (-4 F): Days with min | 6 | 17 | 1949 | 9 |
| -30 C (-22 F): Days with min | 1 | 1 | 1937 | 1 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 30 | 34 | 1938 | 15 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 30 | 18 | 1936 | 10 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 29 | 10 | 1936 | 6 |
| 100 mm (3.94 in): Days with 100 mm or more rain | 18 | 3 | 1921 | 2 |
| 200 mm (7.87 in): Days with 200 mm or more rain | 1 | 1 | 1938 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 17 | 22 | 1952 | 9 |
| 25 cm (9.8 in): Days with 25 cm or more snowfall | 15 | 10 | 1952 | 2 |
| 50 cm (19.7 in): Days with 50 cm or more snowfall | 7 | 4 | 1952 | 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 (2025-12-31).