Redmond climate — normals and trends
Redmond (United States) has a warm-summer mediterranean climate (Csb) under the Köppen-Geiger classification. Its mean annual temperature is 9.4 °C and it receives 517 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 (20.7 °C on average) and the coldest is January (0.0 °C). Rainfall peaks in December.
Redmond averages 116 frost days, 38 hot days (≥ 30 °C) and 97 rainy days per year.
Redmond has warmed by +2.4 °C between 1940 and 2025, or +0.28 °C per decade. This trend is statistically significant.
The number of frost days there went from about 131 to 101 per year over the period.
The hottest day of the period reached 43.7 °C (on 29 June 2021) and the coldest -32.3 °C (on 8 December 1972).
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
RedmondOregon
- coords
- 44.27°, -121.17°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
9.4°C
Average daily high
15.9°C
Average daily low
3.3°C
Annual rainfall
517mm
Sunshine / day
9.9h
Mean relative humidity
59%
Average peak wind
14.8km/h
Seasonal range
20.7°C
Frost days (< 0 °C)
116 d/yr
Hot days (≥ 30 °C)
38 d/yr
Rainy days (≥ 1 mm)
97 d/yr
Annual snowfall
82.7 cm
Average feels-like high
13.1 °C
Average feels-like low
0.4 °C
Average peak gust
33.2 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
16.4 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.4 °C
since 1940
+0.3 °C per decade · r² = 0.61 · 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
43.7 °C
29 June 2021
Coldest day
-32.3 °C
8 December 1972
Wettest day
71 mm
18 November 1996
Windiest day
45.7 km/h
4 December 1951
Strongest gust
102.2 km/h
4 January 2008
Hottest feels-like
40.9 °C
29 June 2021
Coldest feels-like
-36.8 °C
8 December 1972
Snowiest day
23.9 cm
25 February 2019
Sunniest day
15.2 h
16 June 2004
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 | 6.9 °C | +2.5 °C | 57 mm | -23 mm |
| Feb | 5.5 °C | -1.5 °C | 87 mm | +31 mm |
| Mar | 11.7 °C | +1.6 °C | 105 mm | +52 mm |
| Apr | 17.2 °C | +3.1 °C | 17 mm | -21 mm |
| May | 21.0 °C | +2.0 °C | 21 mm | -15 mm |
| Jun | 26.7 °C | +3.2 °C | 4 mm | -19 mm |
| Jul | 31.2 °C | +2.0 °C | 4 mm | -5 mm |
| Aug | 30.7 °C | +2.3 °C | 7 mm | -5 mm |
| Sep | 27.0 °C | +3.0 °C | 19 mm | +4 mm |
| Oct | 16.1 °C | -0.8 °C | 38 mm | +1 mm |
| Nov | 11.8 °C | +2.9 °C | 24 mm | -46 mm |
| Dec | 9.2 °C | +4.3 °C | 123 mm | +35 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 Redmond?
Redmond has a warm-summer mediterranean climate (Köppen Csb). Over 1940-2025, the average annual temperature is 9.4 °C and it receives 517 mm of precipitation per year.
What is the hottest day ever recorded in Redmond?
The hottest day measured in Redmond between 1940 and 2025 was 29 June 2021, reaching 43.7 °C.
What is the coldest day in Redmond?
The coldest day measured in Redmond between 1940 and 2025 was 8 December 1972, at -32.3 °C.
Does it snow in Redmond?
Yes. Redmond gets on average 82.7 cm of snow per year and has around 116 frost days.
Has the climate of Redmond warmed?
Yes: Redmond warmed by +2.4 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Redmond?
The wettest day measured in Redmond between 1940 and 2025 was 18 November 1996, with 71 mm of rain in 24 hours.
What was the windiest day in Redmond?
The windiest day measured in Redmond between 1940 and 2025 was 4 December 1951, with winds reaching 45.7 km/h.
What is the warmest month in Redmond?
The warmest month in Redmond is July (20.7 °C on average); the coldest is January (0.0 °C).
How much does it rain in Redmond?
Redmond receives on average 517 mm of precipitation per year, spread over about 97 rainy days.
Is it sunny in Redmond?
Redmond gets on average 9.9 hours of sunshine per day, roughly 3,614 hours per year over 1940-2025.
What is the biggest single-day snowfall in Redmond?
The heaviest 24-hour snowfall measured in Redmond between 1940 and 2025 was 25 February 2019, with 23.9 cm.
Are there tropical nights in Redmond?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Redmond.
What was the most extreme apparent temperature in Redmond?
In Redmond, between 1940 and 2025, the highest apparent temperature reached 40.9 °C on 29 June 2021, and the lowest was -36.8 °C on 8 December 1972.
Compare Redmond with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Redmond