Fresno’s weather is generally mild and pleasant throughout the year. The sun shines on Fresno 288 days a year resulting in one of the nation’s most hospitable and Mediterranean-like climates. Summers are dry and warm, with highs averaging in the mid to upper 90s. Winters are cool and sometimes foggy. The Fresno area receives little precipitation in summer months, with most rainfall occurring in the first three months of the year.
| Climate data for Fresno, California (Fresno Airport), 1981–2010 normals, extremes 1881–present[a] | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Record high °F (°C) | 78 (26) |
84 (29) |
90 (32) |
101 (38) |
110 (43) |
112 (44) |
115 (46) |
113 (45) |
111 (44) |
102 (39) |
90 (32) |
77 (25) |
115 (46) |
| Average high °F (°C) | 54.8 (12.7) |
61.6 (16.4) |
67.6 (19.8) |
74.6 (23.7) |
84.1 (28.9) |
92.0 (33.3) |
98.4 (36.9) |
97.1 (36.2) |
90.9 (32.7) |
79.5 (26.4) |
65.1 (18.4) |
54.9 (12.7) |
76.7 (24.8) |
| Average low °F (°C) | 38.3 (3.5) |
41.5 (5.3) |
45.6 (7.6) |
49.4 (9.7) |
56.2 (13.4) |
62.4 (16.9) |
67.6 (19.8) |
66.2 (19) |
61.5 (16.4) |
53.0 (11.7) |
43.4 (6.3) |
38.0 (3.3) |
51.9 (11.1) |
| Record low °F (°C) | 17 (−8) |
24 (−4) |
26 (−3) |
32 (0) |
36 (2) |
42 (6) |
50 (10) |
49 (9) |
37 (3) |
27 (−3) |
26 (−3) |
18 (−8) |
17 (−8) |
| Average precipitation inches (mm) | 2.19 (55.6) |
2.03 (51.6) |
2.03 (51.6) |
0.95 (24.1) |
0.43 (10.9) |
0.21 (5.3) |
0.01 (0.3) |
0.01 (0.3) |
0.17 (4.3) |
0.63 (16) |
1.07 (27.2) |
1.77 (45) |
11.50 (292.1) |
| Average precipitation days (≥ 0.01 in) | 7.6 | 8.6 | 7.5 | 4.5 | 2.2 | 0.7 | 0.2 | 0.3 | 1.0 | 2.5 | 5.5 | 7.5 | 48.1 |
| Average relative humidity (%) | 83.3 | 77.2 | 68.9 | 57.4 | 47.3 | 41.9 | 39.2 | 44.7 | 50.0 | 58.5 | 74.1 | 84.2 | 60.6 |
| Mean monthly sunshine hours | 141.5 | 196.9 | 286.2 | 335.5 | 398.9 | 412.2 | 428.2 | 399.6 | 345.9 | 302.3 | 189.9 | 127.1 | 3,564.2 |
| Percent possible sunshine | 46 | 65 | 77 | 85 | 91 | 94 | 96 | 95 | 93 | 87 | 62 | 42 | 80 |
| Source: NOAA (relative humidity and sun 1961–1990)[45][46][47], Weather.com[48] | |||||||||||||