Grants Pass climate — normals and trends
Grants Pass (United States) has a warm-summer mediterranean climate (Csb) under the Köppen-Geiger classification. Its mean annual temperature is 10.9 °C and it receives 944 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 (20.5 °C on average) and the coldest is January (2.8 °C). Rainfall peaks in December.
Grants Pass averages 70 frost days, 39 hot days (≥ 30 °C) and 113 rainy days per year.
Grants Pass has warmed by +1.8 °C between 1940 and 2025, or +0.21 °C per decade. This trend is statistically significant.
The number of frost days there went from about 86 to 54 per year over the period.
The hottest day of the period reached 41.8 °C (on 2 August 2017) and the coldest -24.8 °C (on 22 January 1962).
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
Grants PassOregon
- coords
- 42.44°, -123.33°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
10.9°C
Average daily high
17.4°C
Average daily low
5.4°C
Annual rainfall
944mm
Sunshine / day
9.6h
Mean relative humidity
70%
Average peak wind
10.0km/h
Seasonal range
17.7°C
Frost days (< 0 °C)
70 d/yr
Hot days (≥ 30 °C)
39 d/yr
Rainy days (≥ 1 mm)
113 d/yr
Annual snowfall
73.1 cm
Average feels-like high
15.9 °C
Average feels-like low
3.4 °C
Average peak gust
34.2 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
16.1 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.8 °C
since 1940
+0.2 °C per decade · r² = 0.51 · 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
41.8 °C
2 August 2017
Coldest day
-24.8 °C
22 January 1962
Wettest day
117 mm
29 October 1950
Windiest day
26.6 km/h
12 December 1995
Strongest gust
109.8 km/h
4 December 1951
Hottest feels-like
43.8 °C
7 August 1978
Coldest feels-like
-29.3 °C
22 January 1962
Snowiest day
42.6 cm
14 February 1959
Sunniest day
14.8 h
4 July 2025
Normals computed over complete calendar years 1940–2025.
A specific year
Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 9.1 °C | +1.6 °C | 94 mm | -54 mm |
| Feb | 9.1 °C | -0.9 °C | 153 mm | +39 mm |
| Mar | 12.9 °C | +0.6 °C | 227 mm | +108 mm |
| Apr | 17.6 °C | +2.1 °C | 41 mm | -34 mm |
| May | 21.3 °C | +1.6 °C | 20 mm | -37 mm |
| Jun | 26.3 °C | +2.3 °C | 10 mm | -17 mm |
| Jul | 30.3 °C | +1.1 °C | 0 mm | -6 mm |
| Aug | 30.4 °C | +1.6 °C | 8 mm | -4 mm |
| Sep | 26.2 °C | +0.7 °C | 36 mm | +13 mm |
| Oct | 16.6 °C | -1.9 °C | 85 mm | +18 mm |
| Nov | 13.0 °C | +2.1 °C | 78 mm | -53 mm |
| Dec | 9.0 °C | +1.8 °C | 138 mm | -25 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 Grants Pass?
Grants Pass has a warm-summer mediterranean climate (Köppen Csb). Over 1940-2025, the average annual temperature is 10.9 °C and it receives 944 mm of precipitation per year.
What is the hottest day ever recorded in Grants Pass?
The hottest day measured in Grants Pass between 1940 and 2025 was 2 August 2017, reaching 41.8 °C.
What is the coldest day in Grants Pass?
The coldest day measured in Grants Pass between 1940 and 2025 was 22 January 1962, at -24.8 °C.
Does it snow in Grants Pass?
Yes. Grants Pass gets on average 73.1 cm of snow per year and has around 70 frost days.
Has the climate of Grants Pass warmed?
Yes: Grants Pass warmed by +1.8 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Grants Pass?
The wettest day measured in Grants Pass between 1940 and 2025 was 29 October 1950, with 117 mm of rain in 24 hours.
What was the windiest day in Grants Pass?
The windiest day measured in Grants Pass between 1940 and 2025 was 12 December 1995, with winds reaching 26.6 km/h.
What is the warmest month in Grants Pass?
The warmest month in Grants Pass is July (20.5 °C on average); the coldest is January (2.8 °C).
How much does it rain in Grants Pass?
Grants Pass receives on average 944 mm of precipitation per year, spread over about 113 rainy days.
Is it sunny in Grants Pass?
Grants Pass gets on average 9.6 hours of sunshine per day, roughly 3,504 hours per year over 1940-2025.
What is the biggest single-day snowfall in Grants Pass?
The heaviest 24-hour snowfall measured in Grants Pass between 1940 and 2025 was 14 February 1959, with 42.6 cm.
Are there tropical nights in Grants Pass?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Grants Pass.
What was the most extreme apparent temperature in Grants Pass?
In Grants Pass, between 1940 and 2025, the highest apparent temperature reached 43.8 °C on 7 August 1978, and the lowest was -29.3 °C on 22 January 1962.
Compare Grants Pass with another city
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Nearby cities
The climate around Grants Pass