Climate normals · 1970–2000
Rialto Climate
Rialto is a city in United States (CA) with a population of about 103,132. Its average annual temperature is 18.2°C (65°F), with roughly 324 mm of rain per year.
18.2°C
Avg Temp
324
Precip (mm/yr)
Aug
Hottest Month
Jan
Coldest Month
Rialto Climate
Rialto has an average annual temperature of 18.2°C (65°F) and receives about 324 mm of precipitation per year. The warmest month is August and the coldest is January. Figures are 1970–2000 climate normals.
18.2°C
Avg Temp
324
Precip (mm/yr)
Aug
Hottest Month
Jan
Coldest Month
| Month | Avg (°C/°F) | Precip |
|---|---|---|
| January | 12° / 54° | 66 mm |
| February | 13° / 55° | 68 mm |
| March | 14° / 57° | 62 mm |
| April | 16° / 61° | 21 mm |
| May | 19° / 66° | 8 mm |
| June | 22° / 72° | 2 mm |
| July | 26° / 78° | 2 mm |
| August | 26° / 78° | 5 mm |
| September | 24° / 75° | 9 mm |
| October | 20° / 68° | 10 mm |
| November | 15° / 60° | 30 mm |
| December | 12° / 54° | 41 mm |
1970–2000 normals from WorldClim 2.1 (~9 km grid). Precipitation can be less precise near mountains or coastlines, where rainfall varies sharply over short distances.
Best time to visit Rialto
The most comfortable months to visit Rialto are typically June, October and May, when temperatures are mildest and rainfall is relatively low. The hottest month is August (around 35°C high). The coldest is January (near 5°C low). February is usually the wettest month.
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Frequently Asked Questions
The most comfortable months to visit Rialto are typically June, October and May, when temperatures are mildest and rainfall is relatively low (1970–2000 climate normals).
Rialto, United States has an average annual temperature of 18.2°C and about 324 mm of precipitation per year. The warmest month is August and the coldest is January.
In August, the hottest month, daily highs in Rialto average about 35°C (95°F).
Monthly climate normals (1970–2000) sampled from WorldClim 2.1 at ~9 km resolution. Humidity derived from vapor pressure. City coordinates and population from GeoNames.