Climate and monthly weather forecastGilroy, CA
Climate and monthly weather forecast
Weather in January
January, like December, is a moderate winter month in Gilroy, California, with an average temperature varying between 59.5°F (15.3°C) and 41.4°F (5.2°C). Gilroy sees the arrival of January with an average high-temperature of a still mild 59.5°F (15.3°C), indicating a subtle variation from December. Weather in January »Weather in February
February, the last month of the winter in Gilroy, is a comfortable month, with an average temperature fluctuating between 60.8°F (16°C) and 40.6°F (4.8°C). The shift from January to February is characterized by an average high-temperature of a comfortable 60.8°F (16°C), not significantly different from the 59.5°F (15.3°C) of January. Weather in February »Weather in March
The first month of the spring, March, is also an enjoyable month in Gilroy, California, with an average temperature ranging between min 40.6°F (4.8°C) and max 63.3°F (17.4°C). The beginning of March records an average high-temperature of a still refreshing 63.3°F (17.4°C), marking a negligible difference from February's 60.8°F (16°C). Weather in March »Weather in April
April is a pleasant spring month in Gilroy, California, with an average temperature fluctuating between 42.4°F (5.8°C) and 68.2°F (20.1°C). The commencement of April records an average high-temperature of an agreeable 68.2°F (20.1°C), barely varying from March's 63.3°F (17.4°C). Weather in April »Weather in May
The last month of the spring, May, is also an agreeable month in Gilroy, California, with an average temperature ranging between min 46°F (7.8°C) and max 72.5°F (22.5°C). The transition into May notes an average high-temperature of a still agreeable 72.5°F (22.5°C), revealing a mild distinction from the 68.2°F (20.1°C) in April. Weather in May »Weather in June
June, the first month of the summer in Gilroy, is a warm month, with an average temperature ranging between max 80.8°F (27.1°C) and min 50.9°F (10.5°C). Gilroy in June denotes a subtle temperature transition, adjusting from an average high of an agreeable 72.5°F (22.5°C) in May to a moderately hot 80.8°F (27.1°C). Weather in June »Weather in July
July, the same as June, is a moderately hot summer month in Gilroy, California, with an average temperature ranging between max 84.9°F (29.4°C) and min 54°F (12.2°C). Gilroy in July witnesses an average high-temperature of a still warm 84.9°F (29.4°C), indicating a slight variation from June's 80.8°F (27.1°C). Weather in July »Weather in August
The last month of the summer, August, is also a moderately hot month in Gilroy, California, with an average temperature ranging between min 54.1°F (12.3°C) and max 85.1°F (29.5°C). August temperatures tend to peak at an average high of 85.1°F (29.5°C) and dip to a low of 54.1°F (12.3°C). For most parts of August, the heat index is calculated to be a hot 89.6°F (32°C). Weather in August »Weather in September
The first month of the autumn, September, is still a warm month in Gilroy, California, with an average temperature ranging between min 54.1°F (12.3°C) and max 83.3°F (28.5°C). As August turns into September, the average high-temperatures rest at a still warm 83.3°F (28.5°C), showing a minor variation from the prior month. Weather in September »Weather in October
October, the same as September, is a moderately hot autumn month in Gilroy, California, with temperature in the range of an average high of 75.6°F (24.2°C) and an average low of 51.1°F (10.6°C). Gilroy's progression into October involves a gentle drop in the average high-temperature, from 83.3°F (28.5°C) in September to a still moderately hot 75.6°F (24.2°C). Weather in October »Weather in November
November, the last month of the autumn in Gilroy, is another comfortable month, with an average temperature ranging between max 65.8°F (18.8°C) and min 44.8°F (7.1°C). Gilroy's weather changes with the onset of November, slightly falling from a moderately hot 75.6°F (24.2°C) in October to a refreshing 65.8°F (18.8°C). Weather in November »Weather in December
The first month of the winter, December, is still a refreshing month in Gilroy, California, with an average temperature varying between 57.6°F (14.2°C) and 41.2°F (5.1°C). With its high average temperature of 57.6°F (14.2°C) and a low of 41.2°F (5.1°C), December is regarded as the coldest month. Weather in December »Updated: Aug 6, 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
In Gilroy, during the entire year, the rain falls for 43.4 days and collects up to 3.66" (93mm) of precipitation.
January, February, November and December, with an average maximum UV index of 3, are months with the lowest UV index.
The most humid month is March, with an average relative humidity of 74%.
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.
In Gilroy, rain does not fall in June through August.
With an average of 14h and 42min of daylight, June has the longest days of the year.
The months with the highest UV index are June through August, with an average maximum UV index of 6.
With an average of 12.1h of sunshine, July has the most sunshine of the year.
August proves to be the warmest month, recording an average peak temperature of 85.1°F (29.5°C) and a minimum temperature of 54.1°F (12.3°C).
The least humid month is September, with an average relative humidity of 57%.
Months with rainfall are January through May, September through December.
December stands out as Gilroy's coldest month, with temperatures ranging between an average high of 57.6°F (14.2°C) and a low of 41.2°F (5.1°C).
December is the month with the most rainfall. Rain falls for 6.6 days and accumulates 0.83" (21mm) of precipitation.
The month with the shortest days is December, with an average of 9h and 42min of daylight.
The month with the least sunshine is December, with an average of 6h of sunshine.
Average temperature
Gilroy, CA
The warmest month (with the highest average high temperature) is August (85.1°F).
The month with the lowest average high temperature is December (57.6°F).
The months with the highest average low temperature are August and September (54.1°F).
The coldest months (with the lowest average low temperature) are February and March (40.6°F).
Average pressure
Gilroy, CA
- Average pressure in January:
30.14"Hg - Average pressure in February:
30.08"Hg - Average pressure in March:
30.08"Hg - Average pressure in April:
30.03"Hg - Average pressure in May:
29.98"Hg - Average pressure in June:
29.92"Hg
- Average pressure in July:
29.93"Hg - Average pressure in August:
29.92"Hg - Average pressure in September:
29.92"Hg - Average pressure in October:
29.98"Hg - Average pressure in November:
30.07"Hg - Average pressure in December:
30.11"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.92"Hg).
Average wind speed
Gilroy, CA
- Average wind speed in January:
4mph - Average wind speed in February:
4.4mph - Average wind speed in March:
4.7mph - Average wind speed in April:
5mph - Average wind speed in May:
5.3mph - Average wind speed in June:
5.2mph
- Average wind speed in July:
4.7mph - Average wind speed in August:
4.3mph - Average wind speed in September:
4.2mph - Average wind speed in October:
4mph - Average wind speed in November:
3.9mph - Average wind speed in December:
4.1mph
The windiest month (with the highest average wind speed) is May (5.3mph).
The calmest month (with the lowest average wind speed) is November (3.9mph).
Average humidity
Gilroy, CA
The month with the highest relative humidity is March (74%).
The month with the lowest relative humidity is September (57%).
Average rainfall
Gilroy, CA
- Average rainfall in January:
0.55" - Average rainfall in February:
0.67" - Average rainfall in March:
0.59" - Average rainfall in April:
0.35" - Average rainfall in May:
0.12" - Average rainfall in June:
0"
The wettest month (with the highest rainfall) is December (0.83").
The driest months (with the least rainfall) are June, July and August (0").
Average rainfall days
Gilroy, CA
- Average rainfall days in January:
5.5 days - Average rainfall days in February:
5.4 days - Average rainfall days in March:
8.3 days - Average rainfall days in April:
5.2 days - Average rainfall days in May:
2.4 days - Average rainfall days in June:
0.8 days
- Average rainfall days in July:
1.1 days - Average rainfall days in August:
0.6 days - Average rainfall days in September:
1.7 days - Average rainfall days in October:
2 days - Average rainfall days in November:
3.8 days - Average rainfall days in December:
6.6 days
The month with the highest number of rainy days is March (8.3 days).
The month with the least rainy days is August (0.6 days).
Average daylight / Average sunshine
Gilroy, CA
- Average daylight in January:
10h and 0min - Average daylight in February:
10h and 54min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 12min - Average daylight in May:
14h and 12min - Average daylight in June:
14h and 42min
- Average daylight in July:
14h and 24min - Average daylight in August:
13h and 30min - Average daylight in September:
12h and 24min - Average daylight in October:
11h and 12min - Average daylight in November:
10h and 12min - Average daylight in December:
9h and 42min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in January:
6h and 24min - Average sunshine in February:
6h and 18min - Average sunshine in March:
8h and 18min - Average sunshine in April:
10h and 24min - Average sunshine in May:
11h and 6min - Average sunshine in June:
11h and 48min
- Average sunshine in July:
12h and 6min - Average sunshine in August:
12h and 0min - Average sunshine in September:
11h and 18min - Average sunshine in October:
7h and 12min - Average sunshine in November:
6h and 42min - Average sunshine in December:
6h and 0min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 0min).
Average sunshine days
Gilroy, CA
- Average sunshine days in January:
24.2 days - Average sunshine days in February:
21.5 days - Average sunshine days in March:
21.4 days - Average sunshine days in April:
24 days - Average sunshine days in May:
27.7 days - Average sunshine days in June:
28.7 days
- Average sunshine days in July:
29.9 days - Average sunshine days in August:
29.7 days - Average sunshine days in September:
27.7 days - Average sunshine days in October:
28.3 days - Average sunshine days in November:
24.9 days - Average sunshine days in December:
23.2 days
The month with the most sunshine days is July (29.9 days).
The month with the least sunshine days is March (21.4 days).
Average UV index
Gilroy, CA
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover
Gilroy, CA
The month with the most cloud cover is March (Cloud cover 35).
The month with the least cloud cover is July (Cloud cover 7).
Average visibility
Gilroy, 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).
