Hartland, WI Weather & Climate Normals
Hartland's real weather, in one number
Hartland, WI scores 43/100 on this site's reading of NOAA's own 30-year normals: strongly seasonal. Comfortable weather is limited to a shorter window; summers, winters, or precipitation swing wide. 5 of the year's 12 months average between 55 and 75°F, the range this site counts as mild.
Hartland's hottest and coldest months
Hartland's hottest month is Jul, averaging 71°F; its coldest is Jan, averaging 20°F, a 51.2°F swing across the year, one of the widest gaps in this dataset.
Hartland's weather across the year
| Month | Avg high | Avg low | Precip | Snow |
|---|---|---|---|---|
| Jan | 28°F | 12°F | 1.6in | 10.4in |
| Feb | 32°F | 15°F | 1.71in | 10.1in |
| Mar | 43°F | 24°F | 1.93in | 4.6in |
| Apr | 55°F | 35°F | 3.65in | 1.1in |
| May | 67°F | 46°F | 3.97in | 0in |
| Jun | 77°F | 56°F | 4.88in | 0in |
| Jul | 81°F | 60°F | 3.99in | 0in |
| Aug | 80°F | 59°F | 4.18in | 0in |
| Sep | 73°F | 51°F | 3.27in | 0in |
| Oct | 60°F | 40°F | 2.92in | 0.1in |
| Nov | 45°F | 28°F | 2.15in | 1.8in |
| Dec | 33°F | 18°F | 1.7in | 8.8in |
May, Jun, Jul, Aug, and Sep are the best time to see Hartland at its mildest; the rest of the year, plan around Jan's cold.
Rain and snow in Hartland
Hartland averages 35.95in of precipitation a year across roughly 115 days with measurable rain or snow, and 36.9in of snow a year.
Where Hartland ranks
Hartland ranks 4071 of 4876 US cities in this dataset for comfort score, and 85 of 157 within WI. About 10,203 people live there.
If you need tomorrow's forecast, not the 30-year average
Everything above is a 30-year average from Waukesha Wwtp, WI US, 7.9 miles from Hartland, not a prediction for any specific day.
More on how this is worked out
What a 30-year climate normal actually is · Why this uses the nearest NOAA station