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The driest places in North America in September: ranked by rainfall

Bakersfield tops the list at 0.9 mm in September. Ranked from 1991–2020 climate normals across 50 destinations in North America.

Top three in September: Bakersfield (0.9 mm) , San Francisco (1.7 mm) , Salinas (1.8 mm) . Between first and 50th place the rainfall differs by 32 mm.

# Destination Country Rainfall Avg high Avg low Rainfall Wet days Sunshine Sea temp
1 Bakersfield United States 0.9 mm 33 °C 18 °C 1 mm 0 355 h –
2 San Francisco United States 1.7 mm 23 °C 13 °C 2 mm 0 353 h 14 °C
3 Salinas United States 1.8 mm 24 °C 13 °C 2 mm 1 351 h 15 °C
4 Fresno United States 1.8 mm 33 °C 18 °C 2 mm 0 355 h –
5 Modesto United States 1.9 mm 32 °C 16 °C 2 mm 1 356 h –
6 Oakland United States 1.9 mm 26 °C 14 °C 2 mm 1 353 h –
7 Fremont United States 2.2 mm 28 °C 16 °C 2 mm 0 354 h –
8 Sunnyvale United States 2.4 mm 27 °C 15 °C 2 mm 1 354 h 15 °C
9 Stockton United States 2.4 mm 31 °C 15 °C 2 mm 1 356 h –
10 San Jose United States 2.6 mm 28 °C 16 °C 3 mm 1 354 h –
11 Sacramento United States 2.8 mm 32 °C 15 °C 3 mm 1 355 h –
12 Lancaster United States 2.9 mm 32 °C 17 °C 3 mm 1 355 h –
13 Los Angeles United States 3.3 mm 31 °C 17 °C 3 mm 1 350 h 20 °C
14 Long Beach United States 3.3 mm 27 °C 17 °C 3 mm 0 351 h 20 °C
15 Santa Rosa United States 3.3 mm 29 °C 14 °C 3 mm 1 354 h –
16 Oxnard United States 3.4 mm 24 °C 17 °C 3 mm 1 353 h 19 °C
17 Anaheim United States 3.5 mm 29 °C 17 °C 4 mm 0 350 h 21 °C
18 Huntington Beach United States 3.6 mm 26 °C 18 °C 4 mm 1 350 h 21 °C
19 Oceanside United States 3.6 mm 25 °C 18 °C 4 mm 1 351 h 21 °C
20 Elk Grove United States 3.8 mm 31 °C 15 °C 4 mm 1 355 h –
21 Glendale United States 4.2 mm 31 °C 17 °C 4 mm 1 354 h –
22 Tijuana Mexico 4.3 mm 24 °C 18 °C 4 mm 1 348 h 21 °C
23 San Diego United States 4.4 mm 25 °C 18 °C 4 mm 1 348 h 21 °C
24 Santa Clarita United States 4.5 mm 32 °C 18 °C 4 mm 1 354 h –
25 Pomona United States 4.5 mm 31 °C 17 °C 4 mm 1 350 h –
26 Ontario United States 4.6 mm 32 °C 18 °C 5 mm 1 350 h –
27 Ensenada Mexico 4.7 mm 27 °C 19 °C 5 mm 1 351 h 20 °C
28 Escondido United States 4.9 mm 28 °C 17 °C 5 mm 1 351 h 21 °C
29 Riverside United States 5.1 mm 32 °C 18 °C 5 mm 1 352 h –
30 Windhoek Namibia 5.2 mm 28 °C 11 °C 5 mm 1 345 h –
31 Fontana United States 5.5 mm 32 °C 17 °C 5 mm 1 353 h –
32 Henderson United States 6.6 mm 35 °C 22 °C 7 mm 1 356 h –
33 San Bernardino United States 7.1 mm 32 °C 18 °C 7 mm 2 353 h –
34 Moreno Valley United States 7.2 mm 31 °C 17 °C 7 mm 2 353 h –
35 Las Vegas United States 7.4 mm 34 °C 21 °C 7 mm 1 357 h –
36 Spring Valley United States 8.0 mm 34 °C 20 °C 8 mm 1 357 h –
37 Mexicali Mexico 8.7 mm 39 °C 24 °C 9 mm 1 353 h –
38 Reno United States 9.6 mm 27 °C 14 °C 10 mm 2 354 h –
39 Palmdale United States 10 mm 31 °C 18 °C 10 mm 2 356 h –
40 Boise United States 11 mm 27 °C 13 °C 11 mm 2 344 h –
41 San Luis Río Colorado Mexico 12 mm 38 °C 25 °C 12 mm 2 353 h –
42 Spokane United States 19 mm 25 °C 11 °C 19 mm 4 333 h –
43 Honolulu United States 22 mm 28 °C 24 °C 22 mm 7 350 h 27 °C
44 Albuquerque United States 22 mm 28 °C 15 °C 22 mm 4 346 h –
45 Phoenix United States 25 mm 38 °C 24 °C 25 mm 3 350 h –
46 Mesa United States 27 mm 37 °C 23 °C 27 mm 3 351 h –
47 Aurora United States 28 mm 26 °C 11 °C 28 mm 4 331 h –
48 Tucson United States 29 mm 35 °C 21 °C 29 mm 4 348 h –
49 Ciudad Juárez Mexico 31 mm 31 °C 18 °C 31 mm 4 343 h –
50 Salem United States 33 mm 26 °C 12 °C 33 mm 5 324 h –

Monthly values for the month named in the ranking; only destinations with a published climate page are ranked. Download this ranking as CSV.

The same ranking one month earlier and later

August: top 5

  1. Bakersfield 0.03 mm
  2. Oxnard 0.3 mm
  3. Windhoek 0.3 mm
  4. Anaheim 0.4 mm
  5. Fresno 0.4 mm

Full ranking for August

October: top 5

  1. San Luis Río Colorado 5.0 mm
  2. Mexicali 5.4 mm
  3. Lancaster 8.0 mm
  4. Henderson 8.3 mm
  5. Spring Valley 8.4 mm

Full ranking for October

How this ranking is built

What is ranked
Total precipitation, in mm, in September, lowest first.
Period
1991–2020 climate normals: the same 30 years for every destination, so the list compares like with like.
Who is included
50 destinations in North America with a published climate page. Neighbouring places that share a climate series are shown once.
Ties
Equal values are ordered by fewest wet days.
Sources
ERA5 / ERA5-Land reanalysis via Open-Meteo; sea temperature from NOAA OISST v2.1. Measured values are reproduced unchanged; only the ordering is ours.

Data sources and method

Normal period
1991–2020
Dataset version
era5-1991-2020-scores1.1
Last processed

Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: ranking order, beach and comfort scores. Full formulas are on the methodology page.

Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.