Winter Dec – Feb
The coldest season, with highs of 37–39°F (3–4°C) and lows down to 25°F (-4°C). It's the driest season, with only about 9.6 in (243 mm) of rain or snow, 19% of the year's total. December – February are cold enough for snow. Comfort scores bottom out in December – February; the season averages 40/100.
Spring Mar – May
Temperatures climb through the season, from 48°F highs in March to 66°F by May. About 11.5 in (292 mm) of rain falls across these months, 23% of the year's total. Nights dip below freezing in March. Comfort peaks here: April & May rank with the year's best, and the season averages 66/100.
Summer Jun – Aug
The warmest stretch of the year, with highs of 72–75°F (22–24°C). It's the wettest season, with about 18.0 in (457 mm) of rain, 36% of the year's total. Lows bottom out around 56°F (13°C). June – August score well without being the very best (season average 70/100).
Autumn Sep – Nov
Temperatures slide from 66°F highs in September to 47°F by November. About 10.7 in (272 mm) of rain falls across these months, 22% of the year's total. Lows bottom out around 34°F (1°C). Comfort peaks here: September ranks with the year's best, and the season averages 68/100.