Thornton, California Climate
United States
Pop. 1,131 Elev. 4 m / 13 ft
TZ: America/Los_Angeles (UTC-7) ·
Thornton is largely arid, with hot summers peaking at 91°F (33°C) in August and cool winters around 39°F (4°C) in January. Humidity pushes the summer feels-like temperature to around 99°F (37°C). Precipitation occurs on roughly 27 days per year (19.8 in / 503 mm total). The city averages 206 sunny days per year. Nearby lake water reaches 70°F (21°C) in summer.
| Temperature | 91°F (33°C) high | 39°F (4°C) low |
| Feels like | 99°F (37°C) high | 39°F (4°C) low |
| Rain | 27 days | 19.8 in (503 mm) /yr |
| Sky | 206 sunny | 14 stormy |
| Wind | 3.8 mph (1.7 m/s) avg |
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Explore on the MapMonthly Climate Chart
Best months to visit: Jan, Apr, May, Jun, Jul, Sep, Oct
Sky & Air by Month
Cloud cover (%)
33
Jan 60
Feb 56
Mar 42
Apr 18
May 9
Jun 15
Jul 12
Aug 29
Sep 36
Oct 68
Nov 73
Dec Humidity (%)
66
Jan 71
Feb 67
Mar 58
Apr 45
May 51
Jun 59
Jul 52
Aug 57
Sep 65
Oct 82
Nov 86
Dec Weather Days by Month
Water Temperatures
Cities with Similar Climate
Find similar cities on the map →Nearby Cities
Nearby
Commercial airport 25 mi Stockton Metropolitan Airport (SCK)
Ski resort 76 mi Bear Valley Adventure Company
National park 18 mi Old Sacramento State Historic Park
Mountain peak
(5,056 ft) 59 mi Baltic Peak
Hospital 11 mi Kaiser Permanente Medical Offices
Hiking trail 14 mi ADT - California - T - Seg 6
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Monthly Weather Data
↑ See chart| Month | Avg High | Avg Low | Rainfall | Snowfall | Sunny Days |
|---|---|---|---|---|---|
| January | 62°F 16°C | 39°F 4°C | 0.6 in 16 mm | — | 19 |
| February | 64°F 18°C | 45°F 7°C | 6.7 in 169 mm | — | 6 |
| March | 67°F 20°C | 47°F 8°C | 2.5 in 64 mm | — | 10 |
| April | 76°F 25°C | 51°F 10°C | 0.4 in 10 mm | — | 15 |
| May | 86°F 30°C | 57°F 14°C | 0.1 in 1 mm | — | 26 |
| June | 87°F 31°C | 57°F 14°C | 0.0 in 0 mm | — | 30 |
| July | 87°F 30°C | 59°F 15°C | 0.0 in 0 mm | — | 28 |
| August | 91°F 33°C | 61°F 16°C | 0.0 in 0 mm | — | 29 |
| September | 88°F 31°C | 63°F 17°C | 0.0 in 1 mm | — | 20 |
| October | 76°F 25°C | 54°F 12°C | 1.8 in 46 mm | — | 18 |
| November | 66°F 19°C | 49°F 10°C | 4.7 in 118 mm | — | 3 |
| December | 56°F 13°C | 43°F 6°C | 3.0 in 77 mm | — | 2 |
Weather Days by Month
↑ See chart| Month | Sunny Days | Storm Days |
|---|---|---|
| January | 19 | 1 |
| February | 6 | 4 |
| March | 10 | 3 |
| April | 15 | 0 |
| May | 26 | 0 |
| June | 30 | 0 |
| July | 28 | 0 |
| August | 29 | 0 |
| September | 20 | 0 |
| October | 18 | 0 |
| November | 3 | 3 |
| December | 2 | 3 |
Water Temperatures Data
↑ See chart| Month | Lake Avg High |
|---|---|
| January | 48°F 9°C |
| February | 50°F 10°C |
| March | 54°F 12°C |
| April | 59°F 15°C |
| May | 63°F 17°C |
| June | 67°F 19°C |
| July | 69°F 20°C |
| August | 70°F 21°C |
| September | 70°F 21°C |
| October | 64°F 18°C |
| November | 58°F 15°C |
| December | 50°F 10°C |