Climate and monthly weather forecastGrand Terrace, CA
Climate and monthly weather forecast
Weather in January
January is a comfortable winter month in Grand Terrace, California, with an average temperature ranging between min 44.6°F (7°C) and max 62.2°F (16.8°C). The onset of January notes an average high-temperature of a comfortable 62.2°F (16.8°C), subtly shifted from December's 59.9°F (15.5°C). Weather in January »Weather in February
The last month of the winter, February, is another refreshing month in Grand Terrace, California, with temperature in the range of an average high of 62.4°F (16.9°C) and an average low of 43.5°F (6.4°C). In February, Grand Terrace experiences a barely noticeable shift in meteorological conditions, with average high-temperatures moving from 62.2°F (16.8°C) in January to a still comfortable 62.4°F (16.9°C). Weather in February »Weather in March
The first month of the spring, March, is still a comfortable month in Grand Terrace, California, with an average temperature ranging between max 66.9°F (19.4°C) and min 45.7°F (7.6°C). March's average high-temperature stands at a still comfortable 66.9°F (19.4°C), showing little deviation from February's 62.4°F (16.9°C). Weather in March »Weather in April
April is a pleasant spring month in Grand Terrace, California, with an average temperature fluctuating between 48.7°F (9.3°C) and 71.4°F (21.9°C). April's presence marks an average high-temperature of a pleasant 71.4°F (21.9°C), subtly varied from March's 66.9°F (19.4°C). Weather in April »Weather in May
The last month of the spring, May, is a moderately hot month in Grand Terrace, California, with temperature in the range of an average high of 76.5°F (24.7°C) and an average low of 52.7°F (11.5°C). With the arrival of May, Grand Terrace's average high-temperature registers at a warm 76.5°F (24.7°C), indicating a subtle variation from the previous month. Weather in May »Weather in June
The first month of the summer, June, is still a warm month in Grand Terrace, California, with an average temperature fluctuating between 85.1°F (29.5°C) and 58.5°F (14.7°C). June's onset brings a subtle temperature rise, moving from 76.5°F (24.7°C) in May to a still warm 85.1°F (29.5°C). Weather in June »Weather in July
July is a tropical summer month in Grand Terrace, California, with an average temperature ranging between max 91°F (32.8°C) and min 64.9°F (18.3°C). Grand Terrace's transition into July is marked by a minor temperature shift, moving from a warm 85.1°F (29.5°C) in June to a hot 91°F (32.8°C). Weather in July »Weather in August
The last month of the summer, August, is another tropical month in Grand Terrace, California, with an average temperature fluctuating between 65.8°F (18.8°C) and 91.9°F (33.3°C). August, with average temperatures reaching a high of 91.9°F (33.3°C) and a low of 65.8°F (18.8°C), is the warmest month. Weather in August »Weather in September
September, the first month of the autumn in Grand Terrace, is still a hot month, with temperature in the range of an average high of 87.4°F (30.8°C) and an average low of 63.3°F (17.4°C). Grand Terrace transitions into September recording an average high-temperature of a still hot 87.4°F (30.8°C), closely aligning with the preceding month's temperature. Weather in September »Weather in October
October, like September, in Grand Terrace, California, is another warm autumn month, with temperature in the range of an average low of 56.3°F (13.5°C) and an average high of 78.1°F (25.6°C). The beginning of October involves a decrease in the average high-temperature, transitioning from a tropical 87.4°F (30.8°C) in September to a moderately hot 78.1°F (25.6°C). Weather in October »Weather in November
November, the last month of the autumn in Grand Terrace, is another pleasant month, with an average temperature varying between 49.1°F (9.5°C) and 68.9°F (20.5°C). A moderate decline in the average high-temperature is seen during November, decreasing from a warm 78.1°F (25.6°C) in October to an agreeable 68.9°F (20.5°C). Weather in November »Weather in December
The first month of the winter, December, is still a mild month in Grand Terrace, California, with an average temperature fluctuating between 43.7°F (6.5°C) and 59.9°F (15.5°C). Grand Terrace's December weather reaches an average high of 59.9°F (15.5°C) and an average low of 43.7°F (6.5°C), making it the coldest month. Weather in December »Updated: Aug 21, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Throughout the year, there are 46.6 rainfall days, and 6.18" (157mm) of precipitation is accumulated.
January, March through December are months without snowfall.
In Grand Terrace, during the entire year, snow falls for 0.1 days.
The most humid month is February, with an average relative humidity of 53%.
February is the only month when snow falls.
February has the most snowfall days of the year in Grand Terrace. Snow falls for 0.1 days.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from PST to PDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from PDT to PST.
The month with the least rainfall is June, when the rain falls for 1.2 days and typically collects 0.04" (1mm) of precipitation.
The month with the longest days is June, with an average of 14h and 24min of daylight.
The months with the highest UV index are June through August, with an average maximum UV index of 7.
July has the most sunshine of the year in Grand Terrace, with an average of 12.2h of sunshine.
Grand Terrace's warmest weather arrives in August, when temperatures average a high of 91.9°F (33.3°C) and a low of 65.8°F (18.8°C).
With an average relative humidity of 38%, August is the least humid month.
In Grand Terrace, December registers the lowest temperatures, averaging 59.9°F (15.5°C) at the peak and 43.7°F (6.5°C) at the lowest.
December is the month with the most rainfall. Rain falls for 6 days and accumulates 1.42" (36mm) of precipitation.
December has the shortest days of the year in Grand Terrace, with an average of 9h and 54min of daylight.
The month with the least sunshine is December, with an average of 6.9h of sunshine.
December is the month with the lowest UV index, with an average maximum UV index of 3.
Average temperature
Grand Terrace, CA
The warmest month (with the highest average high temperature) is August (91.9°F).
The month with the lowest average high temperature is December (59.9°F).
The month with the highest average low temperature is August (65.8°F).
The coldest month (with the lowest average low temperature) is February (43.5°F).
Average pressure
Grand Terrace, CA
- Average pressure in January:
30.1"Hg - Average pressure in February:
30.04"Hg - Average pressure in March:
30.01"Hg - Average pressure in April:
29.94"Hg - Average pressure in May:
29.89"Hg - Average pressure in June:
29.85"Hg
- Average pressure in July:
29.88"Hg - Average pressure in August:
29.87"Hg - Average pressure in September:
29.87"Hg - Average pressure in October:
29.93"Hg - Average pressure in November:
30.02"Hg - Average pressure in December:
30.07"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed
Grand Terrace, CA
- Average wind speed in January:
5.3mph - Average wind speed in February:
5.2mph - Average wind speed in March:
5.5mph - Average wind speed in April:
6mph - Average wind speed in May:
6mph - Average wind speed in June:
5.5mph
- Average wind speed in July:
5.1mph - Average wind speed in August:
4.8mph - Average wind speed in September:
4.5mph - Average wind speed in October:
4.8mph - Average wind speed in November:
5.1mph - Average wind speed in December:
5.2mph
The windiest months (with the highest average wind speed) are April and May (6mph).
The calmest month (with the lowest average wind speed) is September (4.5mph).
Average humidity
Grand Terrace, CA
The month with the highest relative humidity is February (53%).
The month with the lowest relative humidity is August (38%).
Average rainfall
Grand Terrace, CA
- Average rainfall in January:
0.91" - Average rainfall in February:
1.3" - Average rainfall in March:
0.71" - Average rainfall in April:
0.67" - Average rainfall in May:
0.16" - Average rainfall in June:
0.04"
- Average rainfall in July:
0.2" - Average rainfall in August:
0.08" - Average rainfall in September:
0.08" - Average rainfall in October:
0.12" - Average rainfall in November:
0.51" - Average rainfall in December:
1.42"
The wettest month (with the highest rainfall) is December (1.42").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days
Grand Terrace, CA
- Average rainfall days in January:
5.8 days - Average rainfall days in February:
5.5 days - Average rainfall days in March:
6.7 days - Average rainfall days in April:
5.9 days - Average rainfall days in May:
3.6 days - Average rainfall days in June:
1.2 days
- Average rainfall days in July:
3.1 days - Average rainfall days in August:
1.7 days - Average rainfall days in September:
1.9 days - Average rainfall days in October:
1.8 days - Average rainfall days in November:
3.4 days - Average rainfall days in December:
6 days
The month with the highest number of rainy days is March (6.7 days).
The month with the least rainy days is June (1.2 days).
Average snowfall days
Grand Terrace, CA
- Average snowfall days in January:
0 days - Average snowfall days in February:
0.1 days - Average snowfall days in March:
0 days - Average snowfall days in April:
0 days - Average snowfall days in May:
0 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0 days - Average snowfall days in November:
0 days - Average snowfall days in December:
0 days
The month with the highest number of snowfall days is February (0.1 days).
The months with the least snowfall days are January, March, April, May, June, July, August, September, October, November and December (0 days).
Average daylight / Average sunshine
Grand Terrace, CA
- Average daylight in January:
10h and 12min - Average daylight in February:
11h and 0min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 6min - Average daylight in May:
13h and 54min - Average daylight in June:
14h and 24min
- Average daylight in July:
14h and 12min - Average daylight in August:
13h and 24min - Average daylight in September:
12h and 24min - Average daylight in October:
11h and 18min - Average daylight in November:
10h and 24min - Average daylight in December:
9h and 54min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in January:
7h and 0min - Average sunshine in February:
7h and 0min - Average sunshine in March:
8h and 54min - Average sunshine in April:
11h and 18min - Average sunshine in May:
11h and 48min - Average sunshine in June:
12h and 6min
- Average sunshine in July:
12h and 12min - Average sunshine in August:
12h and 6min - Average sunshine in September:
10h and 42min - Average sunshine in October:
9h and 0min - Average sunshine in November:
7h and 18min - Average sunshine in December:
6h and 54min
The month with the most sunshine is July (Average sunshine: 12h and 12min).
The month with the least sunshine is December (Average sunshine: 6h and 54min).
Average sunshine days
Grand Terrace, CA
- Average sunshine days in January:
24.2 days - Average sunshine days in February:
21.7 days - Average sunshine days in March:
24.2 days - Average sunshine days in April:
23.3 days - Average sunshine days in May:
26.1 days - Average sunshine days in June:
27.9 days
- Average sunshine days in July:
25.8 days - Average sunshine days in August:
27.7 days - Average sunshine days in September:
26.7 days - Average sunshine days in October:
27.9 days - Average sunshine days in November:
25.7 days - Average sunshine days in December:
24.3 days
The months with the most sunshine days are June and October (27.9 days).
The month with the least sunshine days is February (21.7 days).
Average UV index
Grand Terrace, CA
The months with the highest UV index are June, July and August (UV index 7).
The month with the lowest UV index is December (UV index 3).
Average cloud cover
Grand Terrace, CA
The months with the most cloud cover are February and December (Cloud cover 21).
The month with the least cloud cover is August (Cloud cover 5).
Average visibility
Grand Terrace, CA
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
