Grand Rapids Hydro Threshold Days by Year (CA005031111)
13 fixed thresholds counted per year at Grand Rapids Hydro (CA005031111): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Grand Rapids Hydro Thresholds
- Grand Rapids Hydro: nights with a minimum temperature at or below 0 C (32 F) in 17 years, most in 1974 with 216.
- Grand Rapids Hydro: nights with a minimum temperature at or below -10 C (14 F) in 17 years, most in 1967 with 137.
- Grand Rapids Hydro: nights with a minimum temperature at or below -20 C (-4 F) in 17 years, most in 1972 with 96.
- Grand Rapids Hydro: nights with a minimum temperature at or below -30 C (-22 F) in 17 years, most in 1972 with 39.
- 13 fixed thresholds have at least one qualifying day at Grand Rapids Hydro.
Days at or above 30 C (86 F)
15 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1966 | 1 | 5.3 |
| 1967 | 10 | 5.3 |
| 1969 | 5 | 5.3 |
| 1970 | 6 | 4.7 |
| 1971 | 3 | 4.7 |
| 1972 | 4 | 4.7 |
| 1973 | 3 | 4.7 |
| 1974 | 6 | 4.7 |
| 1975 | 6 | 4.7 |
| 1976 | 4 | 4.7 |
| 1978 | 3 | 4.7 |
| 1979 | 7 | 4.7 |
| 1980 | 5 | 5 |
| 1981 | 2 | 5 |
| 1983 | 8 | 5 |
| Year | First date | Last date |
|---|---|---|
| 1966 | 1966-06-28 | 1966-06-28 |
| 1967 | 1967-06-27 | 1967-09-06 |
| 1969 | 1969-07-11 | 1969-08-21 |
| 1970 | 1970-06-03 | 1970-08-08 |
| 1971 | 1971-08-05 | 1971-08-07 |
| 1972 | 1972-08-19 | 1972-08-29 |
| 1973 | 1973-06-23 | 1973-08-18 |
| 1974 | 1974-06-24 | 1974-08-07 |
| 1975 | 1975-06-25 | 1975-07-30 |
| 1976 | 1976-08-07 | 1976-09-06 |
| 1978 | 1978-07-05 | 1978-08-11 |
| 1979 | 1979-07-05 | 1979-08-20 |
| 1980 | 1980-05-03 | 1980-07-23 |
| 1981 | 1981-07-01 | 1981-07-04 |
| 1983 | 1983-06-11 | 1983-09-02 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 15 | 10 | 1967 | 8 |
| 90 F (32.2 C): Days | 7 | 5 | 1975 | 1 |
| 0 C (32 F): Ice days (max | 16 | 155 | 1972 | 142 |
| 0 C (32 F): Frost days (min | 17 | 216 | 1974 | 201 |
| -10 C (14 F): Days with min | 17 | 137 | 1967 | 122 |
| -20 C (-4 F): Days with min | 17 | 96 | 1972 | 69 |
| -30 C (-22 F): Days with min | 17 | 39 | 1972 | 21 |
| -40 C (-40 F): Days with min | 5 | 3 | 1966 | 2 |
| 20 C (68 F): Tropical nights (min | 8 | 5 | 1979 | 4 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 14 | 20 | 1973 | 15 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 12 | 4 | 1973 | 2 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 3 | 2 | 1966 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 12 | 5 | 1983 | 5 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1966.
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).