Rialto, California Climate
United States
Pop. 103,132 Elev. 386 m / 1,266 ft
TZ: America/Los_Angeles (UTC-7) ·
Dry and hot, Rialto sees August highs of 91°F (33°C) and cool January lows of 39°F (4°C). Expect around 24 rainy days annually (19.1 in / 486 mm total), with 3 in (71 mm) of annual snowfall. The city averages 247 sunny days per year. Ocean water temperatures reach 73°F (23°C) in summer.
| Temperature | 91°F (33°C) high | 39°F (4°C) low |
| Feels like | 93°F (34°C) high | 39°F (4°C) low |
| Rain | 24 days | 19.1 in (486 mm) /yr |
| Snow | 0 days | 2.8 in (71 mm) /yr |
| Sky | 247 sunny | 11 stormy |
| Wind | 2.2 mph (1.0 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 (%)
30
Jan 51
Feb 50
Mar 35
Apr 35
May 19
Jun 10
Jul 15
Aug 26
Sep 18
Oct 42
Nov 37
Dec Humidity (%)
29
Jan 48
Feb 59
Mar 49
Apr 51
May 46
Jun 42
Jul 40
Aug 54
Sep 45
Oct 51
Nov 45
Dec Weather Days by Month
Water Temperatures
Cities with Similar Climate
Find similar cities on the map →Nearby Cities
Nearby
Commercial airport 8 mi San Bernardino International Airport (SBD)
Ski resort 18 mi Mt. Baldy Resort
National park 24 mi Bluff Lake Reserve
Mountain peak
(5,273 ft) 10 mi Monument Peak
Hospital 2 mi Edward G. Hirschman Burn Center
Hiking trail 9 mi Hulda short hike loop
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Monthly Weather Data
↑ See chart| Month | Avg High | Avg Low | Rainfall | Snowfall | Sunny Days |
|---|---|---|---|---|---|
| January | 63°F 17°C | 39°F 4°C | 0.7 in 17 mm | 0.4 in11 mm | 19 |
| February | 67°F 19°C | 45°F 7°C | 3.2 in 81 mm | — | 10 |
| March | 64°F 18°C | 44°F 7°C | 3.0 in 76 mm | 2.1 in53 mm | 12 |
| April | 69°F 21°C | 48°F 9°C | 0.7 in 18 mm | 0.3 in7 mm | 17 |
| May | 78°F 26°C | 55°F 13°C | 0.5 in 13 mm | — | 19 |
| June | 85°F 29°C | 61°F 16°C | 0.1 in 3 mm | — | 27 |
| July | 87°F 31°C | 63°F 17°C | 0.1 in 3 mm | — | 30 |
| August | 91°F 33°C | 67°F 19°C | 0.3 in 7 mm | — | 28 |
| September | 84°F 29°C | 64°F 18°C | 1.2 in 29 mm | — | 23 |
| October | 79°F 26°C | 54°F 12°C | 1.3 in 34 mm | — | 26 |
| November | 70°F 21°C | 49°F 10°C | 4.6 in 117 mm | — | 18 |
| December | 68°F 20°C | 46°F 8°C | 3.5 in 88 mm | — | 18 |
Weather Days by Month
↑ See chart| Month | Sunny Days | Storm Days |
|---|---|---|
| January | 19 | 1 |
| February | 10 | 1 |
| March | 12 | 2 |
| April | 17 | 0 |
| May | 19 | 0 |
| June | 27 | 0 |
| July | 30 | 0 |
| August | 28 | 1 |
| September | 23 | 2 |
| October | 26 | 0 |
| November | 18 | 3 |
| December | 18 | 1 |
Water Temperatures Data
↑ See chart| Month | Ocean Avg High | Lake Avg High |
|---|---|---|
| January | 59°F 15°C | 51°F 11°C |
| February | 59°F 15°C | 54°F 12°C |
| March | 59°F 15°C | 57°F 14°C |
| April | 61°F 16°C | 63°F 17°C |
| May | 66°F 19°C | 69°F 21°C |
| June | 68°F 20°C | 75°F 24°C |
| July | 70°F 21°C | 77°F 25°C |
| August | 73°F 23°C | 81°F 27°C |
| September | 72°F 22°C | 79°F 26°C |
| October | 69°F 21°C | 70°F 21°C |
| November | 67°F 19°C | 64°F 18°C |
| December | 65°F 18°C | 56°F 13°C |