January weather forecastPenryn, CA
January
Weather in January
January, like December, in Penryn, California, is a cool winter month, with an average temperature fluctuating between 39.7°F (4.3°C) and 55°F (12.8°C).Temperature
Penryn's transition from December to January introduces an average high-temperature of a still fresh 55°F (12.8°C), marking an insignificant variation from the 53.4°F (11.9°C). During January, the average low-temperature is a cold 39.7°F (4.3°C).Humidity
The average relative humidity in January is 70%.Rainfall
In Penryn, in January, during 10.6 rainfall days, 4.45" (113mm) of precipitation is typically accumulated. In Penryn, during the entire year, the rain falls for 84.8 days and collects up to 28.86" (733mm) of precipitation.Snowfall
In Penryn, snow does not fall in January, April through November.Daylight
In January, the average length of the day is 9h and 49min.On the first day of the month, sunrise is at 7:23 am and sunset at 4:53 pm. On the last day of January, sunrise is at 7:11 am and sunset at 5:24 pm PST.
Sunshine
The months with the least sunshine are January and December, with an average of 5.8h of sunshine.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 3. A UV Index of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: In January, a daily maximum UV index of 3 leads to the following instructions:
Act with care - The need to guard against sun damage is communicated. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in January
Penryn, CA
- Average high temperature in January: 55°F
The warmest month (with the highest average high temperature) is July (91.9°F).
The month with the lowest average high temperature is December (53.4°F).
- Average low temperature in January: 39.7°F
The month with the highest average low temperature is July (60.6°F).
The coldest month (with the lowest average low temperature) is December (39.2°F).
Average pressure in January
Penryn, 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
Penryn, CA
- Average wind speed in January: 5mph
The windiest months (with the highest average wind speed) are February and March (5.7mph).
The calmest month (with the lowest average wind speed) is August (4.3mph).
Average humidity in January
Penryn, CA
- Average humidity in January: 70%
The month with the highest relative humidity is March (75%).
The month with the lowest relative humidity is July (38%).
Average rainfall in January
Penryn, CA
- Average rainfall in January: 4.45"
The wettest month (with the highest rainfall) is March (5.63").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days in January
Penryn, CA
- Average rainfall days in January: 10.6 days
The month with the highest number of rainy days is March (15.4 days).
The month with the least rainy days is July (1 days).
Average snowfall in January
Penryn, CA
- Average snowfall in January: 0"
The month with the highest snowfall is February (1.18").
The months with the least snowfall are January, April, May, June, July, August, September, October and November (0").
Average snowfall days in January
Penryn, CA
- Average snowfall days in January: 0 days
The month with the highest number of snowfall days is February (0.6 days).
The months with the least snowfall days are January, April, May, June, July, August, September, October and November (0 days).
Average daylight in January /
Average sunshine in January
Penryn, CA
- Average daylight in January: 9h and 48min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in January: 5h and 48min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The months with the least sunshine are January and December (Average sunshine: 5h and 48min).
Average sunshine days in January
Penryn, CA
- Average sunshine days in January: 19.6 days
The month with the most sunshine days is July (29.6 days).
The month with the least sunshine days is March (14.6 days).
Average UV index in January
Penryn, 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
Penryn, CA
- Average cloud cover in January: 35
The month with the most cloud cover is March (Cloud cover 41).
The month with the least cloud cover is July (Cloud cover 4).
Average visibility in January
Penryn, 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).
