Winter Dec – Feb
The coldest season, with highs of 36–39°F (2–4°C) and lows down to 24°F (-4°C). It's the driest season, with only about 8.1 in (207 mm) of rain or snow, 18% 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 65°F by May. About 10.4 in (265 mm) of rain falls across these months, 23% of the year's total. Nights dip below freezing in March. Comfort peaks here: May ranks with the year's best, and the season averages 69/100.
Summer Jun – Aug
Peak warmth: highs of 72–75°F (22–24°C). It's the wettest season, with about 16.7 in (424 mm) of rain, 37% of the year's total. Lows bottom out around 55°F (13°C). June – August score well without being the very best (season average 73/100).
Autumn Sep – Nov
Temperatures slide from 66°F highs in September to 47°F by November. About 9.3 in (237 mm) of rain falls across these months, 21% of the year's total. Lows bottom out around 33°F (1°C). Comfort peaks here: September ranks with the year's best, and the season averages 68/100.