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
Greenfield, California, records a slight change with January's average high-temperatures adjusting to a still refreshing 59.4°F (15.2°C) from December's 56.8°F (13.8°C). Greenfield, during January nights, observes an average temperature of 41.5°F (5.3°C).Humidity
In January, the average relative humidity is 67%.Rainfall
In Greenfield, in January, during 7.7 rainfall days, 1.54" (39mm) of precipitation is typically accumulated. In Greenfield, during the entire year, the rain falls for 62.4 days and collects up to 9.45" (240mm) of precipitation.Daylight
In January, the average length of the day is 10h and 1min.On the first day of the month, sunrise is at 7:16 am and sunset at 5:00 pm. On the last day of January, sunrise is at 7:06 am and sunset at 5:29 pm PST.
Sunshine
In January, the average sunshine is 6.5h.UV index
In January, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: An average maximum UV index of 4 in January leads to these recommendations:
Take necessary precautions - Protection from skin and eye injury is mandatory. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average January temperature?
What is the average humidity in January?
How many days does it rain in January?
What is the average length of the day in January?
What time are sunrise and sunset in January?
How long on average sun shines in January?
What is the UV index intensity in January?
Average temperature in January
Greenfield, CA
- Average high temperature in January: 59.4°F
The warmest month (with the highest average high temperature) is July (89.1°F).
The month with the lowest average high temperature is December (56.8°F).
- Average low temperature in January: 41.5°F
The month with the highest average low temperature is August (58.6°F).
The coldest month (with the lowest average low temperature) is December (40.8°F).
Average pressure in January
Greenfield, CA
- Average pressure in January: 30.13"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.92"Hg).
Average wind speed in January
Greenfield, CA
- Average wind speed in January: 4.7mph
The windiest month (with the highest average wind speed) is May (6.3mph).
The calmest month (with the lowest average wind speed) is November (4.5mph).
Average humidity in January
Greenfield, CA
- Average humidity in January: 67%
The month with the highest relative humidity is February (70%).
The month with the lowest relative humidity is July (46%).
Average rainfall in January
Greenfield, CA
- Average rainfall in January: 1.54"
The wettest month (with the highest rainfall) is December (1.89").
The driest month (with the least rainfall) is August (0.04").
Average rainfall days in January
Greenfield, CA
- Average rainfall days in January: 7.7 days
The month with the highest number of rainy days is March (11.8 days).
The month with the least rainy days is August (0.4 days).
Average daylight in January /
Average sunshine in January
Greenfield, CA
- Average daylight in January: 10h and 0min
The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in January: 6h and 3min
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 6min).
Average sunshine days in January
Greenfield, CA
- Average sunshine days in January: 22.4 days
The month with the most sunshine days is August (30.1 days).
The month with the least sunshine days is March (18.3 days).
Average UV index in January
Greenfield, CA
- Average UV index in January: 4
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are February, November and December (UV index 3).
Average cloud cover in January
Greenfield, CA
- Average cloud cover in January: 29
The months with the most cloud cover are March and December (Cloud cover 32).
The months with the least cloud cover are July and August (Cloud cover 4).
Average visibility in January
Greenfield, 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).
Greenfield, California, USA
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