Gillette climate — normals and trends
Gillette (United States) has a hot-summer humid continental climate (Dfa) under the Köppen-Geiger classification. Its mean annual temperature is 7.6 °C and it receives 469 mm of precipitation per year.
These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.
The warmest month is July (22.4 °C on average) and the coldest is January (-5.4 °C). Rainfall peaks in May.
Gillette averages 154 frost days, 39 hot days (≥ 30 °C) and 93 rainy days per year.
Gillette has warmed by +2.0 °C between 1940 and 2025, or +0.23 °C per decade. This trend is statistically significant.
The number of frost days there went from about 163 to 145 per year over the period.
The hottest day of the period reached 41.2 °C (on 28 July 2006) and the coldest -40.0 °C (on 22 December 1990).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Climate normals · ERA5
GilletteWyoming
- coords
- 44.29°, -105.50°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
7.6°C
Average daily high
13.6°C
Average daily low
1.8°C
Annual rainfall
469mm
Sunshine / day
10.2h
Mean relative humidity
60%
Average peak wind
27.9km/h
Seasonal range
27.8°C
Frost days (< 0 °C)
154 d/yr
Hot days (≥ 30 °C)
39 d/yr
Rainy days (≥ 1 mm)
93 d/yr
Annual snowfall
112.4 cm
Average feels-like high
9.4 °C
Average feels-like low
-2.9 °C
Average peak gust
45.0 km/h
Tropical nights (≥ 20 °C)
4 d/yr
Solar radiation
16.9 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.0 °C
since 1940
+0.2 °C per decade · r² = 0.30 · p = < 0.001
Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).
A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.
Records for the period
Hottest day
41.2 °C
28 July 2006
Coldest day
-40.0 °C
22 December 1990
Wettest day
78 mm
14 June 1976
Windiest day
68.7 km/h
1 May 2008
Strongest gust
108.0 km/h
16 February 2007
Hottest feels-like
38.7 °C
19 July 1983
Coldest feels-like
-46.5 °C
22 December 1990
Snowiest day
36.8 cm
19 April 1973
Sunniest day
15.2 h
12 June 2024
Normals computed over complete calendar years 1940–2025.
A specific year
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Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | -3.6 °C | -3.3 °C | 33 mm | +14 mm |
| Feb | -0.1 °C | -1.7 °C | 6 mm | -14 mm |
| Mar | 11.6 °C | +5.2 °C | 54 mm | +18 mm |
| Apr | 13.4 °C | +1.6 °C | 83 mm | +19 mm |
| May | 18.7 °C | +1.1 °C | 62 mm | -11 mm |
| Jun | 25.0 °C | +1.1 °C | 88 mm | +21 mm |
| Jul | 29.4 °C | -0.1 °C | 52 mm | +13 mm |
| Aug | 28.9 °C | +0.3 °C | 30 mm | -1 mm |
| Sep | 24.6 °C | +2.3 °C | 24 mm | -12 mm |
| Oct | 15.1 °C | +0.8 °C | 65 mm | +25 mm |
| Nov | 10.3 °C | +4.4 °C | 14 mm | -10 mm |
| Dec | 6.8 °C | +5.7 °C | 27 mm | +9 mm |
The year's extremes
What was the weather like that day?
Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.
Frequently asked questions
What is the climate of Gillette?
Gillette has a hot-summer humid continental climate (Köppen Dfa). Over 1940-2025, the average annual temperature is 7.6 °C and it receives 469 mm of precipitation per year.
What is the hottest day ever recorded in Gillette?
The hottest day measured in Gillette between 1940 and 2025 was 28 July 2006, reaching 41.2 °C.
What is the coldest day in Gillette?
The coldest day measured in Gillette between 1940 and 2025 was 22 December 1990, at -40.0 °C.
Does it snow in Gillette?
Yes. Gillette gets on average 112.4 cm of snow per year and has around 154 frost days.
Has the climate of Gillette warmed?
Yes: Gillette warmed by +2.0 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Gillette?
The wettest day measured in Gillette between 1940 and 2025 was 14 June 1976, with 78 mm of rain in 24 hours.
What was the windiest day in Gillette?
The windiest day measured in Gillette between 1940 and 2025 was 1 May 2008, with winds reaching 68.7 km/h.
What is the warmest month in Gillette?
The warmest month in Gillette is July (22.4 °C on average); the coldest is January (-5.4 °C).
How much does it rain in Gillette?
Gillette receives on average 469 mm of precipitation per year, spread over about 93 rainy days.
Is it sunny in Gillette?
Gillette gets on average 10.2 hours of sunshine per day, roughly 3,723 hours per year over 1940-2025.
What is the biggest single-day snowfall in Gillette?
The heaviest 24-hour snowfall measured in Gillette between 1940 and 2025 was 19 April 1973, with 36.8 cm.
Are there tropical nights in Gillette?
Yes: Gillette has on average 4 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Gillette?
In Gillette, between 1940 and 2025, the highest apparent temperature reached 38.7 °C on 19 July 1983, and the lowest was -46.5 °C on 22 December 1990.
Compare Gillette with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Gillette