Arvada climate — normals and trends
Arvada (United States) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 8.8 °C and it receives 544 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 (21.9 °C on average) and the coldest is January (-3.0 °C). Rainfall peaks in May.
Arvada averages 153 frost days, 39 hot days (≥ 30 °C) and 92 rainy days per year.
Arvada has warmed by +2.5 °C between 1940 and 2025, or +0.29 °C per decade. This trend is statistically significant.
The number of frost days there went from about 167 to 139 per year over the period.
The hottest day of the period reached 38.0 °C (on 23 June 1954) and the coldest -40.0 °C (on 12 January 1963).
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
ArvadaColorado
- coords
- 39.80°, -105.09°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
8.8°C
Average daily high
16.4°C
Average daily low
2.2°C
Annual rainfall
544mm
Sunshine / day
10.6h
Mean relative humidity
56%
Average peak wind
14.3km/h
Seasonal range
24.9°C
Frost days (< 0 °C)
153 d/yr
Hot days (≥ 30 °C)
39 d/yr
Rainy days (≥ 1 mm)
92 d/yr
Annual snowfall
135.9 cm
Average feels-like high
13.8 °C
Average feels-like low
-1.2 °C
Average peak gust
31.4 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
18.5 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.5 °C
since 1940
+0.3 °C per decade · r² = 0.44 · 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
38.0 °C
23 June 1954
Coldest day
-40.0 °C
12 January 1963
Wettest day
64 mm
3 April 1986
Windiest day
52.9 km/h
10 October 1949
Strongest gust
104.4 km/h
2 April 1982
Hottest feels-like
37.7 °C
18 July 2022
Coldest feels-like
-45.1 °C
12 January 1963
Snowiest day
42.1 cm
3 April 1986
Sunniest day
14.2 h
29 June 1941
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 | 2.1 °C | -2.3 °C | 32 mm | +8 mm |
| Feb | 6.0 °C | -0.2 °C | 32 mm | +6 mm |
| Mar | 15.2 °C | +5.3 °C | 41 mm | -11 mm |
| Apr | 16.8 °C | +2.1 °C | 38 mm | -35 mm |
| May | 20.9 °C | +1.1 °C | 83 mm | -10 mm |
| Jun | 27.3 °C | +1.2 °C | 85 mm | +27 mm |
| Jul | 31.4 °C | +1.9 °C | 28 mm | -15 mm |
| Aug | 29.9 °C | +1.4 °C | 61 mm | +20 mm |
| Sep | 25.1 °C | +0.7 °C | 51 mm | +11 mm |
| Oct | 19.8 °C | +2.0 °C | 27 mm | -13 mm |
| Nov | 15.4 °C | +5.5 °C | 6 mm | -27 mm |
| Dec | 13.2 °C | +7.7 °C | 19 mm | -5 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 Arvada?
Arvada has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 8.8 °C and it receives 544 mm of precipitation per year.
What is the hottest day ever recorded in Arvada?
The hottest day measured in Arvada between 1940 and 2025 was 23 June 1954, reaching 38.0 °C.
What is the coldest day in Arvada?
The coldest day measured in Arvada between 1940 and 2025 was 12 January 1963, at -40.0 °C.
Does it snow in Arvada?
Yes. Arvada gets on average 135.9 cm of snow per year and has around 153 frost days.
Has the climate of Arvada warmed?
Yes: Arvada warmed by +2.5 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Arvada?
The wettest day measured in Arvada between 1940 and 2025 was 3 April 1986, with 64 mm of rain in 24 hours.
What was the windiest day in Arvada?
The windiest day measured in Arvada between 1940 and 2025 was 10 October 1949, with winds reaching 52.9 km/h.
What is the warmest month in Arvada?
The warmest month in Arvada is July (21.9 °C on average); the coldest is January (-3.0 °C).
How much does it rain in Arvada?
Arvada receives on average 544 mm of precipitation per year, spread over about 92 rainy days.
Is it sunny in Arvada?
Arvada gets on average 10.6 hours of sunshine per day, roughly 3,869 hours per year over 1940-2025.
What is the biggest single-day snowfall in Arvada?
The heaviest 24-hour snowfall measured in Arvada between 1940 and 2025 was 3 April 1986, with 42.1 cm.
Are there tropical nights in Arvada?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Arvada.
What was the most extreme apparent temperature in Arvada?
In Arvada, between 1940 and 2025, the highest apparent temperature reached 37.7 °C on 18 July 2022, and the lowest was -45.1 °C on 12 January 1963.
Compare Arvada with another city
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Nearby cities
The climate around Arvada