January weather forecast
Grimes, CA

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Weather in January

January is a moderate winter month in Grimes, California, with an average temperature fluctuating between 41.9°F (5.5°C) and 56.8°F (13.8°C).

Temperature

As Grimes, California, steps into January, the average high-temperature holds at a refreshing 56.8°F (13.8°C), hinting at a minor fluctuation from the prior month. The average low-temperature of 41.9°F (5.5°C) is witnessed during January.

Humidity

The average relative humidity in January is 70%.

Rainfall

In January, the rain falls for 9.3 days. Throughout January, 2.6" (66mm) of precipitation is accumulated. Throughout the year, there are 75.1 rainfall days, and 17.09" (434mm) of precipitation is accumulated.

Daylight

In January, the average length of the day is 9h and 48min.
On the first day of the month, sunrise is at 7:26 am and sunset at 4:55 pm. On the last day of January, in Grimes, sunrise is at 7:14 am and sunset at 5:26 pm PST.

Sunshine

In Grimes, the average sunshine in January is 6h.

UV index

January, February, November and December, with an average maximum UV index of 3, are months with the lowest UV index. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for average individuals.
Note: A maximum high daily UV index of 3 during January translates into the following directions:
Ensure safety - Imperative it is to shield skin and eyes from damage. It's recommended to limit sun exposure when its radiation is at its peak during midday. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage.
Updated: Jun 18, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the average January temperature?

During January, Grimes experiences an average high-temperature of 56.8°F (13.8°C) and a low-temperature of 41.9°F (5.5°C).

What is the average humidity in January?

In January, the average relative humidity is 70%.

How many days does it rain in January?

In Grimes, California, in January, during 9.3 rainfall days, 2.6" (66mm) of precipitation is typically accumulated.

What is the average length of the day in January?

In Grimes, the average day length in January is 9h and 48min.

When is the sunrise / sunset in January?

On the first day of January, sunrise is at 7:26 am and sunset at 4:55 pm. On the last day of the month, sunrise is at 7:14 am and sunset at 5:26 pm PST.

How long on average sun shines in January in Grimes?

In Grimes, the average sunshine duration in January is 6h.

What is the month with the lowest UV index?

The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 3.

What is the UV index intensity in January?

In January, the average daily maximum UV index is 3. A UV Index reading of 3 to 5 represents a moderate vulnerability from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in January
Grimes, CA

Average temperature in January - Grimes, CA
  • Average high temperature in January: 56.8°F

The warmest month (with the highest average high temperature) is July (97.2°F).
The month with the lowest average high temperature is December (54.5°F).

  • Average low temperature in January: 41.9°F

The month with the highest average low temperature is July (62.1°F).
The coldest month (with the lowest average low temperature) is December (41.4°F).

Average pressure in January
Grimes, CA

Average pressure in January - Grimes, CA
  • Average pressure in January: 30.16"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).

Average wind speed in January
Grimes, CA

Average wind speed in January - Grimes, CA
  • Average wind speed in January: 5mph

The windiest month (with the highest average wind speed) is March (6.1mph).
The calmest month (with the lowest average wind speed) is September (4.5mph).

Average humidity in January
Grimes, CA

Average humidity in January - Grimes, CA
  • Average humidity in January: 70%

The month with the highest relative humidity is March (73%).
The months with the lowest relative humidity are July and September (38%).

Average rainfall in January
Grimes, CA

Average rainfall in January - Grimes, CA
  • Average rainfall in January: 2.6"

The wettest month (with the highest rainfall) is February (3.07").
The driest months (with the least rainfall) are July and August (0.04").

Average rainfall days in January
Grimes, CA

Average rainfall days in January - Grimes, CA
  • Average rainfall days in January: 9.3 days

The month with the highest number of rainy days is March (13.8 days).
The month with the least rainy days is July (0.9 days).

Average daylight in January /
Average sunshine in January
Grimes, CA

Average daylight in January / Average sunshine in January - Grimes, CA
  • Average daylight in January: 9h and 5min

The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).

  • Average sunshine in January: 6h and 0min

The month with the most sunshine is July (Average sunshine: 12h and 12min).
The month with the least sunshine is December (Average sunshine: 5h and 48min).

Average sunshine days in January
Grimes, CA

Average sunshine days in January - Grimes, CA
  • Average sunshine days in January: 20.6 days

The month with the most sunshine days is July (29.7 days).
The month with the least sunshine days is March (16.2 days).

Average UV index in January
Grimes, CA

Average UV index in January - Grimes, CA
  • Average UV index in January: 3

The months with the highest UV index are June and July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 3).

Average cloud cover in January
Grimes, CA

Average cloud cover in January - Grimes, CA
  • Average cloud cover in January: 34

The month with the most cloud cover is March (Cloud cover 37).
The month with the least cloud cover is July (Cloud cover 4).

Average visibility in January
Grimes, CA

Average visibility in January - Grimes, 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).

Grimes, California, USA

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