Contents
- Weather in January
- Frequently asked questions
- Average temperature in January
- Average pressure in January
- Average wind speed in January
- Average humidity in January
- Average rainfall in January
- Average rainfall days in January
- Average daylight in January
- Average sunshine in January
- Average sunshine days in January
- Average UV index in January
- Average cloud cover in January
- Average visibility in January
Weather in January
Temperature
Gilroy, California, commences January with an average high-temperature of a still refreshing 59.5°F (15.3°C), maintaining a close resemblance to the previous month. Throughout the nights in January, Gilroy experiences an average low-temperature of 41.4°F (5.2°C).Humidity
In January, the average relative humidity is 72%.Rainfall
In Gilroy, during January, the rain falls for 5.5 days and regularly aggregates up to 0.55" (14mm) of precipitation. In Gilroy, during the entire year, the rain falls for 43.4 days and collects up to 3.66" (93mm) of precipitation.Daylight
The average length of the day in January in Gilroy, California, is 9h and 58min.On the first day of January, sunrise is at 7:19 am and sunset at 5:00 pm. On the last day of the month, sunrise is at 7:09 am and sunset at 5:29 pm PST.
Sunshine
In January, the average sunshine in Gilroy is 6.4h.UV index
January, February, November and December, with an average maximum UV index of 3, are months with the lowest UV index in Gilroy. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: In January, a regular UV index of 3 translates into these guidelines:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses.
Frequently asked questions
What are the temperatures in Gilroy in January?
What is the average humidity in January in Gilroy?
How many days does it rain in January in Gilroy?
How many hours of daylight does Gilroy have in January?
What time are sunrise and sunset in January in Gilroy?
How long on average sun shines in January in Gilroy?
What is the month with the lowest UV index in Gilroy?
What is the UV index intensity in January in Gilroy?
Average temperature in January
Gilroy, CA
- Average high temperature in January: 59.5°F
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).
- Average low temperature in January: 41.4°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 in January
Gilroy, CA
- Average pressure in January: 30.14"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 in January
Gilroy, CA
- Average wind speed in January: 4mph
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 in January
Gilroy, CA
- Average humidity in January: 72%
The month with the highest relative humidity is March (74%).
The month with the lowest relative humidity is September (57%).
Average rainfall in January
Gilroy, CA
- Average rainfall in January: 0.55"
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 in January
Gilroy, CA
- Average rainfall days in January: 5.5 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 in January /
Average sunshine in January
Gilroy, CA
- Average daylight in January: 10h and 0min
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 2min
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 in January
Gilroy, CA
- Average sunshine days in January: 24.2 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 in January
Gilroy, CA
- Average UV index in January: 3
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 in January
Gilroy, CA
- Average cloud cover in January: 31
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 in January
Gilroy, CA
- Average visibility in January: 6mi
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).
Gilroy, California, USA
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