Annual mean 18°C · wettest around January · prevailing wind W
Warmest
33.5 °C
Coldest
16.0 °C
Wettest
40%
Windiest
3.8 m/s
Prevailing
W
3.0 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 Grand Terrace over the whole year is 18°C. August is the hottest month, with highs of about 33°C; January is the coldest, with lows of about 7°C. The rainy (wet) season in Grand Terrace runs from October to May, peaking in January with a 36% chance of rain on a given day. The dry season is June to September; July is the driest month, at 15%. Winds in Grand Terrace are highest in May, averaging 2.9 m/s (10 km/h), and lightest in December, at 1.7 m/s (6 km/h). The prevailing wind is from the W. The clearest skies in Grand Terrace come in August, when the sky is typically 13% covered; March is the cloudiest month, at 39%.
Month by month Grand Terrace 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
17°C
7°C
13°C
36%
31%
2.0 m/s
43
1
82
February
18°C
7°C
14°C
34%
30%
2.2 m/s
48
4
76
March
18°C
9°C
15°C
35%
39%
2.4 m/s
52
7
77
April
22°C
11°C
19°C
28%
32%
2.7 m/s
71
18
69
May
23°C
14°C
21°C
26%
36%
2.9 m/s
75
25
64
June
29°C
17°C
26°C
17%
22%
2.9 m/s
54
55
28
July
33°C
20°C
31°C
15%
14%
2.8 m/s
20
66
5
August
33°C
20°C
31°C
24%
13%
2.6 m/s
18
65
5
September
30°C
18°C
28°C
20%
21%
2.3 m/s
43
57
18
October
27°C
14°C
24°C
27%
20%
2.1 m/s
64
44
41
November
22°C
9°C
19°C
29%
21%
1.9 m/s
73
16
70
December
17°C
7°C
14°C
35%
28%
1.7 m/s
51
2
82
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 Grand Terrace weather by season
Year round, Grand Terrace has days of about 17°C at their warmest in January, its coolest month, and 33°C in August, its warmest; the coolest hours of the day run from 7°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.
Grand Terrace weather in winterDecember to February
High 17°CLow 7°CRain 35%
Winter in Grand Terrace has typical daily highs of about 17°C and lows of about 7°C, with a 35% chance of rain on a given day.
Grand Terrace weather in springMarch to May
High 21°CLow 11°CRain 30%
Spring in Grand Terrace has typical daily highs of about 21°C and lows of about 11°C, with a 30% chance of rain on a given day.
Grand Terrace weather in summerJune to August
High 32°CLow 19°CRain 19%
Summer in Grand Terrace has typical daily highs of about 32°C and lows of about 19°C, with a 19% chance of rain on a given day.
Grand Terrace weather in autumnSeptember to November
High 26°CLow 14°CRain 25%
Autumn in Grand Terrace has typical daily highs of about 26°C and lows of about 14°C, with a 25% chance of rain on a given day.
When is the rainy season in Grand Terrace?
The rainy (wet) season in Grand Terrace runs from October to May, peaking in January with a 36% chance of rain on a given day. The dry season is June to September; July is the driest month, at 15%.
What time of year is Grand Terrace windiest?
Winds in Grand Terrace are highest in May, averaging 2.9 m/s (10 km/h), and lightest in December, at 1.7 m/s (6 km/h). The prevailing wind is from the W.
What is the average temperature in Grand Terrace year round?
The average temperature in Grand Terrace over the whole year is 18°C. August is the hottest month, with highs of about 33°C; January is the coldest, with lows of about 7°C.