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The warmest places in North America in July: ranked by average high temperature

Mexicali tops the list at 43 °C in July. Ranked from 1991–2020 climate normals across 50 destinations in North America.

Top three in July: Mexicali (43 °C) , San Luis Río Colorado (42 °C) , Phoenix (41 °C) . Between first and 50th place the avg high differs by 9.4 °C.

# Destination Country Avg high Avg high Avg low Rainfall Wet days Sunshine Sea temp
1 Mexicali Mexico 43 °C 43 °C 28 °C 5 mm 1 417 h –
2 San Luis Río Colorado Mexico 42 °C 42 °C 27 °C 4 mm 1 415 h –
3 Phoenix United States 41 °C 41 °C 28 °C 18 mm 3 394 h –
4 Mesa United States 41 °C 41 °C 27 °C 18 mm 3 395 h –
5 Henderson United States 40 °C 40 °C 27 °C 8 mm 2 418 h –
6 Las Vegas United States 39 °C 39 °C 26 °C 7 mm 2 420 h –
7 Spring Valley United States 39 °C 39 °C 25 °C 7 mm 2 421 h –
8 Hermosillo Mexico 39 °C 39 °C 27 °C 39 mm 7 381 h –
9 Ciudad Obregón Mexico 37 °C 37 °C 27 °C 58 mm 10 370 h –
10 Nuevo Laredo Mexico 37 °C 37 °C 26 °C 45 mm 5 384 h –
11 Tucson United States 37 °C 37 °C 25 °C 34 mm 7 384 h –
12 Fresno United States 37 °C 37 °C 21 °C 1 mm 0 429 h –
13 Piedras Negras Mexico 37 °C 37 °C 26 °C 51 mm 6 385 h –
14 Bakersfield United States 36 °C 36 °C 23 °C 1 mm 0 429 h –
15 Ciudad Acuña Mexico 36 °C 36 °C 26 °C 44 mm 5 385 h –
16 Modesto United States 36 °C 36 °C 18 °C 0 mm 0 430 h –
17 Reynosa Mexico 36 °C 36 °C 26 °C 58 mm 6 383 h –
18 Los Mochis Mexico 35 °C 35 °C 27 °C 52 mm 7 368 h 29 °C
19 Ciudad Juárez Mexico 35 °C 35 °C 22 °C 32 mm 5 404 h –
20 Lancaster United States 35 °C 35 °C 20 °C 4 mm 1 428 h –
21 Sacramento United States 35 °C 35 °C 16 °C 0 mm 0 431 h –
22 Fort Worth United States 35 °C 35 °C 25 °C 43 mm 5 384 h –
23 La Paz Mexico 35 °C 35 °C 25 °C 23 mm 4 394 h 27 °C
24 Austin United States 35 °C 35 °C 24 °C 45 mm 6 378 h –
25 Arlington United States 35 °C 35 °C 25 °C 42 mm 6 383 h –
26 Dallas United States 35 °C 35 °C 25 °C 44 mm 6 382 h –
27 San Antonio United States 35 °C 35 °C 24 °C 53 mm 6 378 h –
28 Dessalines Haiti 34 °C 34 °C 25 °C 99 mm 17 364 h –
29 Mérida Mexico 34 °C 34 °C 24 °C 80 mm 15 366 h –
30 Monclova Mexico 34 °C 34 °C 24 °C 61 mm 8 380 h –
31 Culiacán Mexico 34 °C 34 °C 25 °C 135 mm 16 324 h –
32 Oklahoma City United States 34 °C 34 °C 24 °C 60 mm 7 388 h –
33 Plano United States 34 °C 34 °C 25 °C 49 mm 6 382 h –
34 Palmdale United States 34 °C 34 °C 19 °C 16 mm 3 429 h –
35 Guantánamo Cuba 34 °C 34 °C 25 °C 71 mm 15 373 h –
36 Shreveport United States 34 °C 34 °C 24 °C 71 mm 9 374 h –
37 Port-au-Prince Haiti 34 °C 34 °C 26 °C 114 mm 18 367 h 30 °C
38 Bayamo Cuba 34 °C 34 °C 24 °C 117 mm 19 365 h –
39 Ciudad Apodaca Mexico 34 °C 34 °C 22 °C 45 mm 5 373 h –
40 Campeche Mexico 34 °C 34 °C 25 °C 101 mm 17 364 h 30 °C
41 Boise United States 34 °C 34 °C 18 °C 3 mm 1 437 h –
42 Stockton United States 34 °C 34 °C 16 °C 0 mm 0 430 h –
43 Elk Grove United States 34 °C 34 °C 16 °C 0 mm 0 431 h –
44 Torreón Mexico 33 °C 33 °C 22 °C 41 mm 6 386 h –
45 Tulsa United States 33 °C 33 °C 24 °C 83 mm 8 382 h –
46 Cypress United States 33 °C 33 °C 24 °C 80 mm 11 367 h –
47 Lubbock United States 33 °C 33 °C 22 °C 33 mm 6 405 h –
48 Carrefour Haiti 33 °C 33 °C 25 °C 115 mm 18 366 h 30 °C
49 San Bernardino United States 33 °C 33 °C 19 °C 10 mm 2 426 h –
50 Ciudad Benito Juárez Mexico 33 °C 33 °C 22 °C 53 mm 6 375 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

June: top 5

  1. Nuuk 8.8 °C
  2. Saint-Pierre 9.0 °C
  3. Anchorage 16 °C
  4. Halifax 17 °C
  5. Victoria 18 °C

Full ranking for June

August: top 5

  1. Mexicali 42 °C
  2. San Luis Río Colorado 41 °C
  3. Phoenix 40 °C
  4. Mesa 40 °C
  5. Henderson 39 °C

Full ranking for August

How this ranking is built

What is ranked
The average daily high temperature, in °C, in July, highest 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 population.
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.