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Olathe, Kansas climate
Cfa Humid subtropical
Olathe has a strongly seasonal mild-temperate climate (Humid subtropical, Köppen Cfa). The hottest month is July with an average daily high near 88°F, while the coldest is January averaging around 20°F at night. Precipitation totals about 41 inches a year and is strongly seasonal — May alone averages 5.3 inches while January barely receives 1.28 inches. Light snow accumulates each winter (14 inches 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 countsOlathe climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 39 | 44 | 55 | 65 | 75 | 84 | 88 | 87 | 79 | 68 | 54 | 43 |
| Avg temp (°F) | 29 | 34 | 44 | 55 | 65 | 74 | 79 | 77 | 69 | 57 | 45 | 34 |
| Avg low (°F) | 20 | 24 | 34 | 44 | 56 | 65 | 69 | 67 | 58 | 47 | 35 | 25 |
| Precipitation (in) | 1.3 | 1.7 | 2.5 | 4.1 | 5.3 | 5.2 | 4.8 | 4.5 | 4.3 | 3.1 | 2.4 | 1.8 |
| Snowfall (in) | 3.9 | 3.3 | 1.4 | 0.3 | — | — | — | — | — | 0.3 | 1.2 | 3.4 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 39 | 44 | 55 | 65 | 75 | 84 |
| Avg temp (°F) | 29 | 34 | 44 | 55 | 65 | 74 |
| Avg low (°F) | 20 | 24 | 34 | 44 | 56 | 65 |
| Precipitation (in) | 1.3 | 1.7 | 2.5 | 4.1 | 5.3 | 5.2 |
| Snowfall (in) | 3.9 | 3.3 | 1.4 | 0.3 | — | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 88 | 87 | 79 | 68 | 54 | 43 |
| Avg temp (°F) | 79 | 77 | 69 | 57 | 45 | 34 |
| Avg low (°F) | 69 | 67 | 58 | 47 | 35 | 25 |
| Precipitation (in) | 4.8 | 4.5 | 4.3 | 3.1 | 2.4 | 1.8 |
| Snowfall (in) | — | — | — | 0.3 | 1.2 | 3.4 |
How often — frequency of weather events
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 6 | 6 | 8 | 10 | 12 | 10 | 9 | 8 | 8 | 8 | 6 | 6 |
| Days with high ≥ 90°F (days) | — | — | — | 0.1 | 0.7 | 5 | 13 | 13 | 3 | 0.2 | — | — |
| Days with low ≤ 32°F (days) | 26 | 20 | 13 | 3 | — | — | — | — | — | 1 | 11 | 22 |
| Days with snowfall ≥ 1 in (days) | 1 | 1 | 0.5 | 0.1 | — | — | — | — | — | 0.1 | 0.4 | 1 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 6 | 6 | 8 | 10 | 12 | 10 |
| Days with high ≥ 90°F (days) | — | — | — | 0.1 | 0.7 | 5 |
| Days with low ≤ 32°F (days) | 26 | 20 | 13 | 3 | — | — |
| Days with snowfall ≥ 1 in (days) | 1 | 1 | 0.5 | 0.1 | — | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 9 | 8 | 8 | 8 | 6 | 6 |
| Days with high ≥ 90°F (days) | 13 | 13 | 3 | 0.2 | — | — |
| Days with low ≤ 32°F (days) | — | — | — | 1 | 11 | 22 |
| Days with snowfall ≥ 1 in (days) | — | — | — | 0.1 | 0.4 | 1 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 61 | 64 | 63 | 61 | 61 | 52 | 47 | 47 | 45 | 50 | 57 | 59 |
| Clear days (≤ 30% cloud) | 6 | 5 | 6 | 6 | 6 | 8 | 11 | 11 | 12 | 11 | 8 | 7 |
| Partly cloudy days (30–70%) | 11 | 10 | 10 | 9 | 10 | 12 | 12 | 10 | 9 | 9 | 10 | 10 |
| Cloudy days (≥ 70%) | 14 | 14 | 15 | 14 | 14 | 10 | 8 | 9 | 9 | 11 | 12 | 14 |
| Relative humidity (%) | 81 | 78 | 74 | 72 | 75 | 75 | 70 | 68 | 69 | 71 | 76 | 81 |
| Wind speed (mph) | 7.9 | 8.1 | 8.5 | 8.6 | 7.1 | 6.5 | 5.6 | 5.4 | 6.2 | 7.1 | 7.5 | 7.3 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 61 | 64 | 63 | 61 | 61 | 52 |
| Clear days (≤ 30% cloud) | 6 | 5 | 6 | 6 | 6 | 8 |
| Partly cloudy days (30–70%) | 11 | 10 | 10 | 9 | 10 | 12 |
| Cloudy days (≥ 70%) | 14 | 14 | 15 | 14 | 14 | 10 |
| Relative humidity (%) | 81 | 78 | 74 | 72 | 75 | 75 |
| Wind speed (mph) | 7.9 | 8.1 | 8.5 | 8.6 | 7.1 | 6.5 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 47 | 47 | 45 | 50 | 57 | 59 |
| Clear days (≤ 30% cloud) | 11 | 11 | 12 | 11 | 8 | 7 |
| Partly cloudy days (30–70%) | 12 | 10 | 9 | 9 | 10 | 10 |
| Cloudy days (≥ 70%) | 8 | 9 | 9 | 11 | 12 | 14 |
| Relative humidity (%) | 70 | 68 | 69 | 71 | 76 | 81 |
| Wind speed (mph) | 5.6 | 5.4 | 6.2 | 7.1 | 7.5 | 7.3 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from NOAA's U.S. Climate Normals, measured at Olathe 3E (NOAA GHCN station USC00145972), about 5 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.