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Klamath Falls, Oregon climate
Csb Warm-summer Mediterranean
Klamath Falls has a seasonal cool-temperate climate (Warm-summer Mediterranean, Köppen Csb). The hottest month is July with an average daily high near 29°C, while the coldest is December averaging around −5°C at night. Precipitation totals about 386 mm a year and is strongly seasonal — January alone averages 68 mm while July barely receives 4 mm. Winters bring significant snowfall (66 cm of snow per year on average).
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation split into rain and snow · 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 countsKlamath Falls climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 4 | 6 | 9 | 12 | 17 | 23 | 29 | 29 | 25 | 17 | 8 | 3 |
| Avg temp (°C) | 0 | 1 | 4 | 6 | 11 | 15 | 20 | 20 | 16 | 10 | 3 | −1 |
| Avg low (°C) | −5 | −4 | −2 | 0 | 4 | 7 | 11 | 11 | 7 | 3 | −2 | −5 |
| Precipitation (mm) | 68 | 26 | 38 | 29 | 42 | 22 | 4 | 13 | 8 | 17 | 58 | 60 |
| Snowfall (cm) | 25 | 9 | 4 | 0 | 0 | — | — | — | — | — | 8 | 21 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 4 | 6 | 9 | 12 | 17 | 23 |
| Avg temp (°C) | 0 | 1 | 4 | 6 | 11 | 15 |
| Avg low (°C) | −5 | −4 | −2 | 0 | 4 | 7 |
| Precipitation (mm) | 68 | 26 | 38 | 29 | 42 | 22 |
| Snowfall (cm) | 25 | 9 | 4 | 0 | 0 | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 29 | 29 | 25 | 17 | 8 | 3 |
| Avg temp (°C) | 20 | 20 | 16 | 10 | 3 | −1 |
| Avg low (°C) | 11 | 11 | 7 | 3 | −2 | −5 |
| Precipitation (mm) | 4 | 13 | 8 | 17 | 58 | 60 |
| Snowfall (cm) | — | — | — | — | 8 | 21 |
How often — frequency of weather events
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 12 | 9 | 9 | 9 | 7 | 4 | 2 | 2 | 1 | 4 | 8 | 10 |
| Days with high ≥ 32°C (days) | — | — | — | — | 0.6 | 2 | 10 | 9 | 2 | — | — | — |
| Days with low ≤ 0°C (days) | 22 | 19 | 18 | 13 | 4 | 0.8 | 0.3 | — | 1 | 9 | 17 | 20 |
| Days with snowfall ≥ 2.5 cm (days) | 2 | 2 | 0.6 | 0.1 | 0.1 | — | — | — | — | — | 0.6 | 2 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 12 | 9 | 9 | 9 | 7 | 4 |
| Days with high ≥ 32°C (days) | — | — | — | — | 0.6 | 2 |
| Days with low ≤ 0°C (days) | 22 | 19 | 18 | 13 | 4 | 0.8 |
| Days with snowfall ≥ 2.5 cm (days) | 2 | 2 | 0.6 | 0.1 | 0.1 | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 2 | 2 | 1 | 4 | 8 | 10 |
| Days with high ≥ 32°C (days) | 10 | 9 | 2 | — | — | — |
| Days with low ≤ 0°C (days) | 0.3 | — | 1 | 9 | 17 | 20 |
| Days with snowfall ≥ 2.5 cm (days) | — | — | — | — | 0.6 | 2 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 67 | 66 | 66 | 64 | 57 | 41 | 26 | 27 | 34 | 49 | 65 | 68 |
| Clear days (≤ 30% cloud) | 4 | 5 | 5 | 6 | 8 | 14 | 21 | 21 | 17 | 11 | 5 | 4 |
| Partly cloudy days (30–70%) | 10 | 8 | 10 | 9 | 10 | 8 | 7 | 7 | 8 | 10 | 10 | 10 |
| Cloudy days (≥ 70%) | 17 | 15 | 16 | 15 | 13 | 8 | 3 | 3 | 5 | 10 | 15 | 17 |
| Relative humidity (%) | 87 | 83 | 78 | 74 | 69 | 62 | 50 | 45 | 47 | 60 | 77 | 86 |
| Wind speed (mph) | 3.5 | 3.7 | 3.8 | 3.8 | 3.6 | 3.4 | 2.8 | 2.8 | 2.9 | 3.2 | 3.4 | 3.6 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 67 | 66 | 66 | 64 | 57 | 41 |
| Clear days (≤ 30% cloud) | 4 | 5 | 5 | 6 | 8 | 14 |
| Partly cloudy days (30–70%) | 10 | 8 | 10 | 9 | 10 | 8 |
| Cloudy days (≥ 70%) | 17 | 15 | 16 | 15 | 13 | 8 |
| Relative humidity (%) | 87 | 83 | 78 | 74 | 69 | 62 |
| Wind speed (mph) | 3.5 | 3.7 | 3.8 | 3.8 | 3.6 | 3.4 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 26 | 27 | 34 | 49 | 65 | 68 |
| Clear days (≤ 30% cloud) | 21 | 21 | 17 | 11 | 5 | 4 |
| Partly cloudy days (30–70%) | 7 | 7 | 8 | 10 | 10 | 10 |
| Cloudy days (≥ 70%) | 3 | 3 | 5 | 10 | 15 | 17 |
| Relative humidity (%) | 50 | 45 | 47 | 60 | 77 | 86 |
| Wind speed (mph) | 2.8 | 2.8 | 2.9 | 3.2 | 3.4 | 3.6 |
Methodology & sources
Temperature — modelled for this location from ERA5-Land reanalysis, a ~9 km global grid, because no long-record weather station is close enough to use.
Precipitation — 1991–2020 normals computed from 10 years of daily observations at Klamath Falls 2 Ssw, a weather station, about 3 km from the city centre. The underlying daily records come from NOAA's global station network.
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.