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West Lafayette, Indiana climate
Cfa Humid subtropical
West Lafayette has a strongly seasonal cool-temperate climate (Humid subtropical, Köppen Cfa). The hottest month is July with an average daily high near 30°C, while the coldest is January averaging around −7°C at night. Around 1088 mm of precipitation falls each year, peaking in June (132 mm) and easing off in February (56 mm).
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figuresHours of sunshine per day
Estimated sunny hours each month — daylight length × clear-sky fraction · 1991–2020 monthly cloud cover (NASA POWER)West Lafayette climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 2 | 5 | 11 | 18 | 24 | 29 | 30 | 29 | 26 | 20 | 12 | 5 |
| Avg temp (°C) | −2 | 0 | 5 | 12 | 17 | 22 | 24 | 23 | 20 | 13 | 6 | 0 |
| Avg low (°C) | −7 | −6 | 0 | 5 | 11 | 16 | 18 | 17 | 13 | 6 | 1 | −4 |
| Precipitation (mm) | 60 | 56 | 73 | 104 | 120 | 132 | 120 | 93 | 79 | 98 | 85 | 70 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 2 | 5 | 11 | 18 | 24 | 29 |
| Avg temp (°C) | −2 | 0 | 5 | 12 | 17 | 22 |
| Avg low (°C) | −7 | −6 | 0 | 5 | 11 | 16 |
| Precipitation (mm) | 60 | 56 | 73 | 104 | 120 | 132 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 30 | 29 | 26 | 20 | 12 | 5 |
| Avg temp (°C) | 24 | 23 | 20 | 13 | 6 | 0 |
| Avg low (°C) | 18 | 17 | 13 | 6 | 1 | −4 |
| Precipitation (mm) | 120 | 93 | 79 | 98 | 85 | 70 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 72 | 72 | 68 | 66 | 66 | 59 | 52 | 50 | 48 | 58 | 66 | 71 |
| Relative humidity (%) | 86 | 84 | 80 | 76 | 77 | 78 | 77 | 75 | 71 | 73 | 79 | 85 |
| Wind speed (mph) | 8.8 | 8.5 | 8.6 | 8.7 | 7.2 | 5.7 | 4.9 | 4.7 | 5.4 | 6.9 | 7.9 | 8.1 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 72 | 72 | 68 | 66 | 66 | 59 |
| Relative humidity (%) | 86 | 84 | 80 | 76 | 77 | 78 |
| Wind speed (mph) | 8.8 | 8.5 | 8.6 | 8.7 | 7.2 | 5.7 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 52 | 50 | 48 | 58 | 66 | 71 |
| Relative humidity (%) | 77 | 75 | 71 | 73 | 79 | 85 |
| Wind speed (mph) | 4.9 | 4.7 | 5.4 | 6.9 | 7.9 | 8.1 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 30 years of daily observations at Purdue University Airport, a weather station, about 4 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.