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
The average high-temperature during January is a still refreshing 57.6°F (14.2°C), almost matching the conditions of the preceding month. Nighttime temperatures consistently average a frosty 45.1°F (7.3°C) during January.Humidity
In January, the average relative humidity is 72%.Rainfall
In January, the rain falls for 9.3 days. Throughout January, 1.61" (41mm) of precipitation is accumulated. Throughout the year, there are 63.3 rainfall days, and 9.53" (242mm) of precipitation is accumulated.Daylight
The average length of the day in January in Menlo Park is 9h and 56min.On the first day of the month, sunrise is at 7:23 am and sunset at 5:01 pm. On the last day of January, in Menlo Park, sunrise is at 7:12 am and sunset at 5:31 pm PST.
Sunshine
In Menlo Park, the average sunshine in January is 6.3h.UV index
The average daily maximum UV index in January is 4. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for the ordinary person.Note: The maximum daily UV index of 4 in January converts into the following recommendations:
Exercise prevention - Precautions against solar damage are endorsed. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. Always opt for UVA and UVB-resistant sunglasses on radiant days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in January?
What is the average humidity in January?
How many days does it rain in January?
How many hours of daylight does Menlo Park have in January?
When is the sunrise / sunset in January?
How long on average sun shines in January in Menlo Park?
How high is the UV index in January?
Average temperature in January
Menlo Park, CA
- Average high temperature in January: 57.6°F
The warmest months (with the highest average high temperature) are July and August (77.5°F).
The month with the lowest average high temperature is December (56.3°F).
- Average low temperature in January: 45.1°F
The month with the highest average low temperature is August (57°F).
The coldest months (with the lowest average low temperature) are January and February (45.1°F).
Average pressure in January
Menlo 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 and September (29.92"Hg).
Average wind speed in January
Menlo Park, CA
- Average wind speed in January: 5.2mph
The windiest months (with the highest average wind speed) are April and May (6.5mph).
The calmest months (with the lowest average wind speed) are September and October (4.9mph).
Average humidity in January
Menlo Park, CA
- Average humidity in January: 72%
The month with the highest relative humidity is March (74%).
The months with the lowest relative humidity are September and October (65%).
Average rainfall in January
Menlo Park, CA
- Average rainfall in January: 1.61"
The wettest month (with the highest rainfall) is February (2.01").
The driest month (with the least rainfall) is July (0").
Average rainfall days in January
Menlo Park, CA
- Average rainfall days in January: 9.3 days
The month with the highest number of rainy days is March (12.3 days).
The month with the least rainy days is August (0.6 days).
Average daylight in January /
Average sunshine in January
Menlo Park, CA
- Average daylight in January: 9h and 5min
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 36min).
- 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: 5h and 54min).
Average sunshine days in January
Menlo Park, CA
- Average sunshine days in January: 21.3 days
The month with the most sunshine days is July (30.2 days).
The month with the least sunshine days is March (18 days).
Average UV index in January
Menlo Park, CA
- Average UV index in January: 4
The months with the highest UV index are April, May, June, July, August, September and October (UV index 5).
The months with the lowest UV index are February, November and December (UV index 3).
Average cloud cover in January
Menlo Park, CA
- Average cloud cover in January: 30
The months with the most cloud cover are March and December (Cloud cover 34).
The month with the least cloud cover is July (Cloud cover 6).
Average visibility in January
Menlo 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).
Menlo Park, California, USA
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