Climate
Orange County weather by month
Average highs, lows, rain and snow for every month, from 30 years of weather records.
Average temperatures
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
Best time to visit: May, June, October, when highs are mild and rain is lightest.
Month by month
| Month | High | Low | Rain | Wet days |
|---|---|---|---|---|
| January | 68°F | 43°F | 3.1 in | 6 |
| February | 69°F | 45°F | 3.4 in | 7 |
| March | 72°F | 48°F | 2.1 in | 5 |
| April | 74°F | 50°F | 0.80 in | 3 |
| May | 77°F | 55°F | 0.30 in | 2 |
| June | 80°F | 58°F | 0.10 in | 0 |
| July | 85°F | 61°F | 0.00 in | 0 |
| August | 87°F | 63°F | 0.00 in | 0 |
| September | 87°F | 61°F | 0.20 in | 0 |
| October | 84°F | 55°F | 0.70 in | 2 |
| November | 76°F | 47°F | 1.2 in | 3 |
| December | 70°F | 43°F | 2.2 in | 5 |
NOAA U.S. Climate Normals 1991–2020, Tustin Irvine Rch, Ca Us (0.4 mi away, 235 ft). Wet days: days with at least 0.01 in of precipitation.
Questions
What is the hottest month in Orange County?
August, with an average high of 87°F and low of 63°F.
What is the coldest month in Orange County?
December, with an average low of 43°F and high of 70°F.
When does it rain most in Orange County?
February is the wettest month, averaging 3.4 in of precipitation; the year totals about 14.1 inches.
What is the best time to visit Orange County?
For mild weather (highs between 65°F and 85°F) with the least rain, May, June, October.
Where do these numbers come from?
NOAA’s 1991–2020 U.S. Climate Normals for the Tustin Irvine Rch weather station, 0.4 miles from downtown: 30-year averages, not a forecast.