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Moses Lake, Washington climate
BSk Cold semi-arid
Moses Lake has a seasonal cool-temperate climate (Cold semi-arid, Köppen BSk). The hottest month is July with an average daily high near 32°C, while the coldest is December averaging around −5°C at night. Precipitation totals about 198 mm a year and is strongly seasonal — December alone averages 28 mm while August barely receives 4 mm.
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figuresClear vs cloudy days
Share of days each month that are clear, partly cloudy or cloudy · 1991–2020 · hover a month for the day countsMoses Lake climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 2 | 7 | 13 | 18 | 23 | 27 | 32 | 31 | 26 | 17 | 8 | 2 |
| Avg temp (°C) | −1 | 2 | 6 | 10 | 15 | 19 | 23 | 22 | 17 | 10 | 3 | −1 |
| Avg low (°C) | −5 | −3 | 0 | 3 | 7 | 11 | 14 | 13 | 8 | 3 | −2 | −5 |
| Precipitation (mm) | 26 | 17 | 19 | 17 | 18 | 19 | 7 | 4 | 7 | 17 | 22 | 28 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 2 | 7 | 13 | 18 | 23 | 27 |
| Avg temp (°C) | −1 | 2 | 6 | 10 | 15 | 19 |
| Avg low (°C) | −5 | −3 | 0 | 3 | 7 | 11 |
| Precipitation (mm) | 26 | 17 | 19 | 17 | 18 | 19 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 32 | 31 | 26 | 17 | 8 | 2 |
| Avg temp (°C) | 23 | 22 | 17 | 10 | 3 | −1 |
| Avg low (°C) | 14 | 13 | 8 | 3 | −2 | −5 |
| Precipitation (mm) | 7 | 4 | 7 | 17 | 22 | 28 |
How often — frequency of weather events
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 9 | 6 | 7 | 5 | 6 | 5 | 2 | 2 | 3 | 7 | 9 | 10 |
| Days with high ≥ 32°C (days) | — | — | — | — | 2 | 5 | 17 | 15 | 3 | — | — | — |
| Days with low ≤ 0°C (days) | 26 | 22 | 16 | 6 | 1 | — | — | — | 0.2 | 9 | 19 | 27 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 9 | 6 | 7 | 5 | 6 | 5 |
| Days with high ≥ 32°C (days) | — | — | — | — | 2 | 5 |
| Days with low ≤ 0°C (days) | 26 | 22 | 16 | 6 | 1 | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 2 | 2 | 3 | 7 | 9 | 10 |
| Days with high ≥ 32°C (days) | 17 | 15 | 3 | — | — | — |
| Days with low ≤ 0°C (days) | — | — | 0.2 | 9 | 19 | 27 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 74 | 66 | 65 | 62 | 59 | 54 | 34 | 37 | 43 | 57 | 69 | 73 |
| Clear days (≤ 30% cloud) | 2 | 4 | 4 | 5 | 7 | 8 | 17 | 16 | 13 | 8 | 3 | 2 |
| Partly cloudy days (30–70%) | 8 | 9 | 11 | 12 | 11 | 12 | 9 | 10 | 9 | 10 | 10 | 9 |
| Cloudy days (≥ 70%) | 21 | 15 | 16 | 14 | 14 | 11 | 5 | 6 | 8 | 13 | 17 | 20 |
| Relative humidity (%) | 85 | 75 | 65 | 56 | 50 | 46 | 40 | 41 | 46 | 60 | 76 | 84 |
| Wind speed (m/s) | 2.3 | 2.5 | 2.6 | 2.5 | 2.4 | 2.5 | 2.3 | 2.2 | 2.2 | 2.2 | 2.3 | 2.2 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 74 | 66 | 65 | 62 | 59 | 54 |
| Clear days (≤ 30% cloud) | 2 | 4 | 4 | 5 | 7 | 8 |
| Partly cloudy days (30–70%) | 8 | 9 | 11 | 12 | 11 | 12 |
| Cloudy days (≥ 70%) | 21 | 15 | 16 | 14 | 14 | 11 |
| Relative humidity (%) | 85 | 75 | 65 | 56 | 50 | 46 |
| Wind speed (m/s) | 2.3 | 2.5 | 2.6 | 2.5 | 2.4 | 2.5 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 34 | 37 | 43 | 57 | 69 | 73 |
| Clear days (≤ 30% cloud) | 17 | 16 | 13 | 8 | 3 | 2 |
| Partly cloudy days (30–70%) | 9 | 10 | 9 | 10 | 10 | 9 |
| Cloudy days (≥ 70%) | 5 | 6 | 8 | 13 | 17 | 20 |
| Relative humidity (%) | 40 | 41 | 46 | 60 | 76 | 84 |
| Wind speed (m/s) | 2.3 | 2.2 | 2.2 | 2.2 | 2.3 | 2.2 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from NOAA's U.S. Climate Normals, measured at Moses Lake Grant CO AP (NOAA GHCN station USW00024110), about 8 km from the city centre.
Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.