Lacey climate — normals and trends
Lacey (United States) has a warm-summer mediterranean climate (Csb) under the Köppen-Geiger classification. Its mean annual temperature is 10.6 °C and it receives 1,365 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 August (17.9 °C on average) and the coldest is January (4.3 °C). Rainfall peaks in November.
Lacey averages 17 frost days, 4 hot days (≥ 30 °C) and 150 rainy days per year.
Lacey has warmed by +1.4 °C between 1940 and 2025, or +0.16 °C per decade. This trend is statistically significant.
The number of frost days there went from about 23 to 11 per year over the period.
The hottest day of the period reached 38.0 °C (on 28 June 2021) and the coldest -17.6 °C (on 31 January 1950).
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
LaceyWashington
- coords
- 47.03°, -122.82°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
10.6°C
Average daily high
14.5°C
Average daily low
7.4°C
Annual rainfall
1,365mm
Sunshine / day
8.4h
Mean relative humidity
80%
Average peak wind
13.8km/h
Seasonal range
13.6°C
Frost days (< 0 °C)
17 d/yr
Hot days (≥ 30 °C)
4 d/yr
Rainy days (≥ 1 mm)
150 d/yr
Annual snowfall
35.5 cm
Average feels-like high
12.9 °C
Average feels-like low
5.2 °C
Average peak gust
32.7 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
12.6 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.4 °C
since 1940
+0.2 °C per decade · r² = 0.35 · 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
28 June 2021
Coldest day
-17.6 °C
31 January 1950
Wettest day
96 mm
25 November 1998
Windiest day
44.9 km/h
20 January 1993
Strongest gust
116.3 km/h
20 January 1993
Hottest feels-like
40.4 °C
29 July 2009
Coldest feels-like
-22.5 °C
31 January 1950
Snowiest day
24.0 cm
18 November 1946
Sunniest day
15.6 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 | 7.4 °C | +0.8 °C | 69 mm | -124 mm |
| Feb | 7.4 °C | -1.0 °C | 162 mm | +13 mm |
| Mar | 11.5 °C | +0.9 °C | 200 mm | +46 mm |
| Apr | 15.3 °C | +1.9 °C | 76 mm | -34 mm |
| May | 17.6 °C | +0.6 °C | 43 mm | -31 mm |
| Jun | 21.2 °C | +1.4 °C | 19 mm | -31 mm |
| Jul | 24.3 °C | +1.0 °C | 1 mm | -18 mm |
| Aug | 24.3 °C | +1.0 °C | 40 mm | +11 mm |
| Sep | 21.3 °C | +0.9 °C | 35 mm | -24 mm |
| Oct | 14.8 °C | -0.1 °C | 153 mm | +25 mm |
| Nov | 11.2 °C | +1.5 °C | 179 mm | -23 mm |
| Dec | 9.4 °C | +2.6 °C | 291 mm | +92 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 Lacey?
Lacey has a warm-summer mediterranean climate (Köppen Csb). Over 1940-2025, the average annual temperature is 10.6 °C and it receives 1,365 mm of precipitation per year.
What is the hottest day ever recorded in Lacey?
The hottest day measured in Lacey between 1940 and 2025 was 28 June 2021, reaching 38.0 °C.
What is the coldest day in Lacey?
The coldest day measured in Lacey between 1940 and 2025 was 31 January 1950, at -17.6 °C.
Does it snow in Lacey?
Yes. Lacey gets on average 35.5 cm of snow per year and has around 17 frost days.
Has the climate of Lacey warmed?
Yes: Lacey warmed by +1.4 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Lacey?
The wettest day measured in Lacey between 1940 and 2025 was 25 November 1998, with 96 mm of rain in 24 hours.
What was the windiest day in Lacey?
The windiest day measured in Lacey between 1940 and 2025 was 20 January 1993, with winds reaching 44.9 km/h.
What is the warmest month in Lacey?
The warmest month in Lacey is August (17.9 °C on average); the coldest is January (4.3 °C).
How much does it rain in Lacey?
Lacey receives on average 1,365 mm of precipitation per year, spread over about 150 rainy days.
Is it sunny in Lacey?
Lacey gets on average 8.4 hours of sunshine per day, roughly 3,066 hours per year over 1940-2025.
What is the biggest single-day snowfall in Lacey?
The heaviest 24-hour snowfall measured in Lacey between 1940 and 2025 was 18 November 1946, with 24.0 cm.
Are there tropical nights in Lacey?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Lacey.
What was the most extreme apparent temperature in Lacey?
In Lacey, between 1940 and 2025, the highest apparent temperature reached 40.4 °C on 29 July 2009, and the lowest was -22.5 °C on 31 January 1950.
Compare Lacey with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Lacey