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Derby, Kansas climate
Cfa Humid subtropical
Derby has a strongly seasonal mild-temperate climate (Humid subtropical, Köppen Cfa). The hottest month is July with an average daily high near 34°C, while the coldest is January averaging around −5°C at night. Precipitation totals about 871 mm a year and is strongly seasonal — May alone averages 131 mm while January barely receives 22 mm. Light snow accumulates each winter (32 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 countsDerby climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 7 | 9 | 15 | 20 | 25 | 31 | 34 | 33 | 29 | 22 | 14 | 8 |
| Avg temp (°C) | 1 | 3 | 9 | 14 | 19 | 25 | 28 | 27 | 22 | 15 | 8 | 2 |
| Avg low (°C) | −5 | −3 | 2 | 7 | 13 | 19 | 21 | 20 | 16 | 8 | 2 | −4 |
| Precipitation (mm) | 22 | 30 | 58 | 79 | 131 | 125 | 101 | 109 | 77 | 72 | 35 | 31 |
| Snowfall (cm) | 7 | 9 | 5 | 1 | — | — | — | — | — | 1 | 2 | 8 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 7 | 9 | 15 | 20 | 25 | 31 |
| Avg temp (°C) | 1 | 3 | 9 | 14 | 19 | 25 |
| Avg low (°C) | −5 | −3 | 2 | 7 | 13 | 19 |
| Precipitation (mm) | 22 | 30 | 58 | 79 | 131 | 125 |
| Snowfall (cm) | 7 | 9 | 5 | 1 | — | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 34 | 33 | 29 | 22 | 14 | 8 |
| Avg temp (°C) | 28 | 27 | 22 | 15 | 8 | 2 |
| Avg low (°C) | 21 | 20 | 16 | 8 | 2 | −4 |
| Precipitation (mm) | 101 | 109 | 77 | 72 | 35 | 31 |
| Snowfall (cm) | — | — | — | 1 | 2 | 8 |
How often — frequency of weather events
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 5 | 5 | 7 | 8 | 11 | 10 | 8 | 8 | 7 | 7 | 5 | 5 |
| Days with high ≥ 32°C (days) | — | — | — | 0.3 | 3 | 14 | 21 | 18 | 8 | 1 | — | — |
| Days with low ≤ 0°C (days) | 28 | 21 | 11 | 3 | 0.0 | — | — | — | 0.0 | 2 | 13 | 25 |
| Days with snowfall ≥ 2.5 cm (days) | 0.8 | 1.0 | 0.7 | 0.0 | — | — | — | — | — | 0.1 | 0.2 | 1 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 5 | 5 | 7 | 8 | 11 | 10 |
| Days with high ≥ 32°C (days) | — | — | — | 0.3 | 3 | 14 |
| Days with low ≤ 0°C (days) | 28 | 21 | 11 | 3 | 0.0 | — |
| Days with snowfall ≥ 2.5 cm (days) | 0.8 | 1.0 | 0.7 | 0.0 | — | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 8 | 8 | 7 | 7 | 5 | 5 |
| Days with high ≥ 32°C (days) | 21 | 18 | 8 | 1 | — | — |
| Days with low ≤ 0°C (days) | — | — | 0.0 | 2 | 13 | 25 |
| Days with snowfall ≥ 2.5 cm (days) | — | — | — | 0.1 | 0.2 | 1 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 54 | 59 | 60 | 58 | 58 | 50 | 44 | 45 | 45 | 46 | 51 | 54 |
| Clear days (≤ 30% cloud) | 9 | 6 | 7 | 7 | 7 | 8 | 12 | 12 | 12 | 13 | 10 | 9 |
| Partly cloudy days (30–70%) | 11 | 10 | 11 | 10 | 11 | 13 | 12 | 12 | 9 | 9 | 10 | 10 |
| Cloudy days (≥ 70%) | 11 | 12 | 14 | 13 | 13 | 9 | 7 | 8 | 9 | 9 | 10 | 12 |
| Relative humidity (%) | 73 | 71 | 68 | 65 | 69 | 68 | 63 | 63 | 63 | 65 | 70 | 75 |
| Wind speed (km/h) | 11.8 | 12.1 | 13.2 | 13.8 | 12.3 | 12.1 | 10.9 | 10.4 | 11.7 | 12.4 | 12.2 | 11.3 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 54 | 59 | 60 | 58 | 58 | 50 |
| Clear days (≤ 30% cloud) | 9 | 6 | 7 | 7 | 7 | 8 |
| Partly cloudy days (30–70%) | 11 | 10 | 11 | 10 | 11 | 13 |
| Cloudy days (≥ 70%) | 11 | 12 | 14 | 13 | 13 | 9 |
| Relative humidity (%) | 73 | 71 | 68 | 65 | 69 | 68 |
| Wind speed (km/h) | 11.8 | 12.1 | 13.2 | 13.8 | 12.3 | 12.1 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 44 | 45 | 45 | 46 | 51 | 54 |
| Clear days (≤ 30% cloud) | 12 | 12 | 12 | 13 | 10 | 9 |
| Partly cloudy days (30–70%) | 12 | 12 | 9 | 9 | 10 | 10 |
| Cloudy days (≥ 70%) | 7 | 8 | 9 | 9 | 10 | 12 |
| Relative humidity (%) | 63 | 63 | 63 | 65 | 70 | 75 |
| Wind speed (km/h) | 10.9 | 10.4 | 11.7 | 12.4 | 12.2 | 11.3 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from NOAA's U.S. Climate Normals, measured at Wichita (NOAA GHCN station USW00003928), about 20 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.