Most comfortable places in the US in September

Ranked by the most days with highs of 65-80°F and a dew point under 60°F in September (cities with humidity data only). First: Everett, WA (24 days), of 342 cities.

Most comfortable places in the US in September
Rank	City	Comfortable days	High	Wet days
1	Everett, WA	24 days	70°F	9
2	Santa Maria, CA	24 days	75°F	1
3	Tacoma, WA	24 days	71°F	7
4	Incline Village, NV	23 days	70°F	2
5	Hayward, CA	23 days	75°F	1
6	Salinas, CA	23 days	74°F	1
7	San Mateo, CA	23 days	75°F	1
8	Seattle, WA	23 days	71°F	9
9	Aspen, CO	22 days	67°F	10
10	Taos, NM	22 days	75°F	6
11	Fremont, CA	21 days	77°F	1
12	Kent, WA	21 days	72°F	8
13	Jackson, WY	21 days	68°F	8
14	Santa Clara, CA	21 days	78°F	1
15	South Lake Tahoe, CA	21 days	73°F	2
16	Sunnyvale, CA	21 days	78°F	1
17	Friday Harbor, WA	20 days	68°F	12
18	Monterey, CA	20 days	71°F	2
19	Sun Valley, ID	20 days	69°F	4
20	Steamboat Springs, CO	19 days	74°F	10
21	Oxnard, CA	19 days	74°F	2
22	Cannon Beach, OR	19 days	68°F	9
23	Oceanside, CA	19 days	71°F	1
24	San Francisco, CA	19 days	70°F	1
25	Bangor, ME	18 days	71°F	9

Which states lead

California (12 of the top 25), Washington (5 of the top 25), Colorado (2 of the top 25), then 6 more states. The top 25 range from 24 days to 18 days; the median across all 342 cities is 9 days.

The other end: fewest comfortable days in September

Lihue, HI0 days
Kihei, HI0 days
Honolulu, HI0 days
Hilo, HI0 days
Haleiwa, HI0 days

Most comfortable places through the year

Month	First place	Comfortable days
January	Palm Springs, CA	22 days
February	Glendale, AZ	20 days
March	Anaheim, CA	24 days
April	Anaheim, CA	22 days
May	Torrance, CA	26 days
June	Santa Maria, CA	27 days
July	Salinas, CA	28 days
August	Santa Maria, CA	28 days
September	Everett, WA	24 days
October	Oceanside, CA	25 days
November	San Diego, CA	23 days
December	Anaheim, CA	22 days

342 cities with data for this measure. Folded suburbs share their lead city's values and are not listed separately. Methodology.