Annual mean 18°C · wettest around January · prevailing wind SW
Warmest
29.7 °C
Coldest
16.8 °C
Wettest
19%
Windiest
3.9 m/s
Prevailing
SW
3.1 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
never good
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Every reading
bars actual · line feels-like, °Cchance of rain, %wind speed, m/ssky covered, %
The average temperature in Tustin over the whole year is 18°C. August is the hottest month, with highs of about 29°C; January is the coldest, with lows of about 9°C. Tustin has no sharply defined rainy season: the chance of rain on a given day runs from 2% in July, the driest month, to 16% in January, the wettest. Winds in Tustin are highest in May, averaging 2.5 m/s (9 km/h), and lightest in December, at 1.6 m/s (6 km/h). The prevailing wind is from the SW. The clearest skies in Tustin come in November, when the sky is typically 25% covered; May is the cloudiest month, at 51%.
Month by month Tustin climate by month: average temperatures year round · click a month to read it
Month
High
Low
Feels like
Chance of rain
Cloud
Wind
Being outside
Sun
Walking
January
18°C
9°C
15°C
16%
34%
1.8 m/s
55
1
87
February
18°C
10°C
15°C
16%
34%
2.1 m/s
55
4
82
March
19°C
11°C
15°C
15%
42%
2.3 m/s
59
4
84
April
21°C
13°C
18°C
8%
39%
2.4 m/s
76
11
80
May
21°C
15°C
19°C
6%
51%
2.5 m/s
84
12
79
June
25°C
17°C
23°C
3%
43%
2.5 m/s
79
34
54
July
28°C
20°C
27°C
2%
28%
2.5 m/s
57
60
25
August
29°C
20°C
28°C
6%
26%
2.3 m/s
50
67
17
September
28°C
19°C
27°C
4%
31%
2.1 m/s
61
53
28
October
26°C
16°C
24°C
9%
28%
1.9 m/s
77
39
49
November
22°C
12°C
19°C
11%
25%
1.7 m/s
82
14
75
December
18°C
9°C
16°C
14%
31%
1.6 m/s
64
2
88
High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.
Seasons, and the year in short Tustin weather by season
Year round, Tustin has days of about 18°C at their warmest in January, its coolest month, and 29°C in August, its warmest; the coolest hours of the day run from 9°C to 20°C through the year, and the average temperature over the year is 18°C around the clock. Rain is most likely around January and least likely around July. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.
Tustin weather in winterDecember to February
High 18°CLow 9°CRain 16%
Winter in Tustin has typical daily highs of about 18°C and lows of about 9°C, with a 16% chance of rain on a given day.
Tustin weather in springMarch to May
High 20°CLow 13°CRain 10%
Spring in Tustin has typical daily highs of about 20°C and lows of about 13°C, with a 10% chance of rain on a given day.
Tustin weather in summerJune to August
High 27°CLow 19°CRain 3%
Summer in Tustin has typical daily highs of about 27°C and lows of about 19°C, with a 3% chance of rain on a given day.
Tustin weather in autumnSeptember to November
High 25°CLow 15°CRain 8%
Autumn in Tustin has typical daily highs of about 25°C and lows of about 15°C, with a 8% chance of rain on a given day.
When is the rainy season in Tustin?
Tustin has no sharply defined rainy season: the chance of rain on a given day runs from 2% in July, the driest month, to 16% in January, the wettest.
What time of year is Tustin windiest?
Winds in Tustin are highest in May, averaging 2.5 m/s (9 km/h), and lightest in December, at 1.6 m/s (6 km/h). The prevailing wind is from the SW.
What is the average temperature in Tustin year round?
The average temperature in Tustin over the whole year is 18°C. August is the hottest month, with highs of about 29°C; January is the coldest, with lows of about 9°C.