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
With January's arrival, Rohnert Park's weather records an average high-temperature of a still refreshing 57°F (13.9°C), marking little difference from December's 55.6°F (13.1°C). An average low-temperature of 43.2°F (6.2°C) marks the nights throughout January.Humidity
The average relative humidity in January is 75%.Rainfall
In Rohnert Park, in January, it is raining for 5.6 days, with typically 0.51" (13mm) of accumulated precipitation. In Rohnert Park, California, during the entire year, the rain falls for 44.3 days and collects up to 3.78" (96mm) of precipitation.Daylight
The average length of the day in January in Rohnert Park is 9h and 52min.On the first day of January, sunrise is at 7:27 am and sunset at 5:00 pm. On the last day of the month, sunrise is at 7:16 am and sunset at 5:31 pm PST.
Sunshine
In January, the average sunshine in Rohnert Park is 5.8h.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 value of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for average individuals.Note: During January, 3 as the daily maximum UV index converts into the following advice:
Ensure safety - Recommendations to avert sunburn are presented. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.
Frequently asked questions
What are the temperatures in Rohnert Park in January?
What is the average humidity in January in Rohnert Park?
How many days does it rain in January in Rohnert Park?
How many hours of daylight does Rohnert Park have in January?
What time are sunrise and sunset in January in Rohnert Park?
How long on average sun shines in January in Rohnert Park?
What are the months with the lowest UV index in Rohnert Park?
What is the UV index reading in January in Rohnert Park?
Average temperature in January
Rohnert Park, CA
- Average high temperature in January: 57°F
The warmest months (with the highest average high temperature) are July and August (79.9°F).
The month with the lowest average high temperature is December (55.6°F).
- Average low temperature in January: 43.2°F
The months with the highest average low temperature are August and September (55°F).
The coldest month (with the lowest average low temperature) is December (42.4°F).
Average pressure in January
Rohnert Park, 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
Rohnert Park, CA
- Average wind speed in January: 5.1mph
The windiest month (with the highest average wind speed) is May (6.8mph).
The calmest month (with the lowest average wind speed) is November (4.7mph).
Average humidity in January
Rohnert Park, CA
- Average humidity in January: 75%
The month with the highest relative humidity is March (77%).
The month with the lowest relative humidity is September (62%).
Average rainfall in January
Rohnert Park, CA
- Average rainfall in January: 0.51"
The wettest month (with the highest rainfall) is February (0.91").
The driest months (with the least rainfall) are June, July, August and September (0.04").
Average rainfall days in January
Rohnert Park, CA
- Average rainfall days in January: 5.6 days
The month with the highest number of rainy days is March (8.7 days).
The month with the least rainy days is August (0.5 days).
Average daylight in January /
Average sunshine in January
Rohnert Park, CA
- Average daylight in January: 9h and 5min
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 5min
The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).
Average sunshine days in January
Rohnert Park, CA
- Average sunshine days in January: 23.8 days
The month with the most sunshine days is June (27.7 days).
The month with the least sunshine days is March (20.8 days).
Average UV index in January
Rohnert Park, CA
- Average UV index in January: 3
The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in January
Rohnert Park, CA
- Average cloud cover in January: 36
The month with the most cloud cover is March (Cloud cover 38).
The month with the least cloud cover is July (Cloud cover 9).
Average visibility in January
Rohnert Park, 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).
Rohnert Park, California, USA
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