Riga Threshold Days by Year (LG000026422)
11 fixed thresholds counted per year at Riga (LG000026422): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Riga Thresholds
- Riga: days with 10 mm (0.39 in) or more of precipitation in 50 years, most in 1950 with 21.
- Riga: days with a maximum temperature at or below 0 C (32 F) in 49 years, most in 1963 with 95.
- Riga: nights with a minimum temperature at or below 0 C (32 F) in 49 years, most in 1956 with 159.
- Riga: nights with a minimum temperature at or below -10 C (14 F) in 47 years, most in 1963 with 78.
- 11 fixed thresholds have at least one qualifying day at Riga.
Days at or above 30 C (86 F)
23 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1943 | 1 | 1 |
| 1944 | 1 | 1 |
| 1946 | 1 | 1 |
| 1951 | 1 | 2.4 |
| 1954 | 3 | 2.4 |
| 1956 | 3 | 2.4 |
| 1958 | 1 | 2.4 |
| 1959 | 4 | 2.4 |
| 1963 | 8 | 2.8 |
| 1964 | 1 | 2.8 |
| 1967 | 1 | 2.8 |
| 1968 | 3 | 2.8 |
| 1969 | 1 | 2.8 |
| 1971 | 7 | 2.4 |
| 1972 | 2 | 2.4 |
| 1973 | 1 | 2.4 |
| 1976 | 1 | 2.4 |
| 1979 | 1 | 2.4 |
| 1982 | 2 | 2 |
| 1984 | 1 | 2 |
| 1986 | 2 | 2 |
| 1988 | 2 | 2 |
| 1989 | 3 | 2 |
| Year | First date | Last date |
|---|---|---|
| 1943 | 1943-08-04 | 1943-08-04 |
| 1944 | 1944-07-10 | 1944-07-10 |
| 1946 | 1946-05-31 | 1946-05-31 |
| 1951 | 1951-08-06 | 1951-08-06 |
| 1954 | 1954-06-21 | 1954-07-10 |
| 1956 | 1956-06-08 | 1956-06-10 |
| 1958 | 1958-05-26 | 1958-05-26 |
| 1959 | 1959-07-10 | 1959-07-22 |
| 1963 | 1963-07-24 | 1963-08-04 |
| 1964 | 1964-06-15 | 1964-06-15 |
| 1967 | 1967-08-03 | 1967-08-03 |
| 1968 | 1968-06-18 | 1968-07-07 |
| 1969 | 1969-07-25 | 1969-07-25 |
| 1971 | 1971-05-18 | 1971-08-07 |
| 1972 | 1972-06-13 | 1972-06-28 |
| 1973 | 1973-06-28 | 1973-06-28 |
| 1976 | 1976-07-25 | 1976-07-25 |
| 1979 | 1979-06-25 | 1979-06-25 |
| 1982 | 1982-08-08 | 1982-08-09 |
| 1984 | 1984-07-12 | 1984-07-12 |
| 1986 | 1986-06-19 | 1986-08-05 |
| 1988 | 1988-06-07 | 1988-06-25 |
| 1989 | 1989-07-08 | 1989-08-17 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 23 | 8 | 1963 | 3 |
| 90 F (32.2 C): Days | 5 | 1 | 1959 | 1 |
| 0 C (32 F): Ice days (max | 49 | 95 | 1963 | 24 |
| 0 C (32 F): Frost days (min | 49 | 159 | 1956 | 96 |
| -10 C (14 F): Days with min | 47 | 78 | 1963 | 11 |
| -20 C (-4 F): Days with min | 35 | 20 | 1985 | 1 |
| -30 C (-22 F): Days with min | 6 | 3 | 1956 | 3 |
| 20 C (68 F): Tropical nights (min | 6 | 2 | 1989 | 2 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 50 | 21 | 1950 | 11 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 35 | 6 | 1986 | 1 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 4 | 1 | 1945 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1943.
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).