January 2021 Weather History in Mill Valley California, United States

The data for this report comes from the San Francisco International Airport. See all nearby weather stations

This report shows the past weather for Mill Valley, providing a weather history for January 2021. It features all historical weather data series we have available, including the Mill Valley temperature history for January 2021. You can drill down from year to month and even day level reports by clicking on the graphs.

Mill Valley Temperature History January 2021

Temperature history in January 2021 in Mill Valley18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313135°F35°F40°F40°F45°F45°F50°F50°F55°F55°F60°F60°F65°F65°F70°F70°F75°F75°FDecFeb
The daily range of reported temperatures (gray bars) and 24-hour highs (red ticks) and lows (blue ticks), placed over the daily average high (faint red line) and low (faint blue line) temperature, with 25th to 75th and 10th to 90th percentile bands.

Hourly Temperature in January 2021 in Mill Valley

Hourly Temperature in January 2021 in Mill Valley18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM3 AM3 AM6 AM6 AM9 AM9 AM12 PM12 PM3 PM3 PM6 PM6 PM9 PM9 PM12 AM12 AMDecFebcoldcool
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The hourly reported temperature, color coded into bands. The shaded overlays indicate night and civil twilight.
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Cloud Cover in January 2021 in Mill Valley

Cloud Cover in January 2021 in Mill Valley18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM3 AM3 AM6 AM6 AM9 AM9 AM12 PM12 PM3 PM3 PM6 PM6 PM9 PM9 PM12 AM12 AMDecFeb
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
no significant cloudno cloud detectedceiling and visibility ok
The hourly reported cloud coverage, categorized by the percentage of the sky covered by clouds.

Daily Precipitation in January 2021 in Mill Valley

Daily Precipitation in January 2021 in Mill Valley1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310.0 in0.0 in0.5 in0.5 in1.0 in1.0 in1.5 in1.5 in2.0 in2.0 inDecFeb
The daily measured quantity of liquid or liquid-equivalent precipitation.

Observed Weather in January 2021 in Mill Valley

Observed Weather in January 2021 in Mill Valley18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM3 AM3 AM6 AM6 AM9 AM9 AM12 PM12 PM3 PM3 PM6 PM6 PM9 PM9 PM12 AM12 AMDecFeb
foghazedrizzlelight rainmoderate rainheavy rainfreezing rainsleetsnow grainslight snowmoderate snowheavy snowhailthunderstorm
The hourly observed weather, color coded by category (in order of severity). If multiple reports are present, the most severe code is shown.
DayObservationsPrecipitationCodes
Sat, Jan 2 Rain, Light Rain, Mist0.19 inRA, -RA, BR
Sun, Jan 3 Fog, MistFG, BR
Mon, Jan 4 Rain, Light Rain, Haze, Mist0.30 inRA, -RA, HZ, BR
Wed, Jan 6 Light Rain0.02 in-RA
Thu, Jan 7 MistBR
Sat, Jan 9 Fog, MistFG, BR
Mon, Jan 11 Haze, MistHZ, BR
Wed, Jan 13 MistBR
Thu, Jan 14 MistBR
Fri, Jan 15 MistBR
Fri, Jan 22 Light Rain0.07 in-RA
Sun, Jan 24 Heavy Rain, Rain, Light Rain0.15 in+RA, RA, -RA
Tue, Jan 26 Heavy Rain, Rain, Light Rain, Mist0.71 in+RA, RA, -RA, BR
Wed, Jan 27 Heavy Rain, Light Rain, Mist0.78 in+RA, -RA, BR
Thu, Jan 28 Heavy Rain, Rain, Light Rain, Mist0.57 in+RA, RA, -RA, BR
Fri, Jan 29 Rain, Light Rain0.13 inRA, -RA

Hours of Daylight and Twilight in January 2021 in Mill Valley

The number of hours during which the Sun is visible (black line). From bottom (most yellow) to top (most gray), the color bands indicate: full daylight, twilight (civil, nautical, and astronomical), and full night.

Sunrise & Sunset with Twilight in January 2021 in Mill Valley

The solar day over the course of January 2021. From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The day, twilights (civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray.

Solar Elevation and Azimuth in January 2021 in Mill Valley

Solar Elevation and Azimuth in January 2021 in Mill ValleyJan112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM2 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AMDecFeb00101020203030001010202030
northeastsouthwest
Solar elevation and azimuth over the course of January 2021. The black lines are lines of constant solar elevation (the angle of the sun above the horizon, in degrees). The background color fills indicate the azimuth (the compass bearing) of the sun. The lightly tinted areas at the boundaries of the cardinal compass points indicate the implied intermediate directions (northeast, southeast, southwest, and northwest).

Moon Rise, Set & Phases in January 2021 in Mill Valley

Moon Rise, Set & Phases in January 2021 in Mill Valley18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMDecFebDec 297:29 PMDec 297:29 PMJan 129:01 PMJan 129:01 PMJan 2811:17 AMJan 2811:17 AM4:42 PM4:42 PM8:04 AM8:04 AM7:12 AM7:12 AM4:47 PM4:47 PM4:26 PM4:26 PM7:33 AM7:33 AM
The time in which the moon is above the horizon (light blue area), with new moons (dark gray lines) and full moons (blue lines) indicated. The shaded overlays indicate night and civil twilight.
Jan 2021IlluminationMoonriseMoonsetMoonriseMeridian PassingDistance
1
94%-9:38 AMWNW7:45 PMENE2:11 AMS239,279 mi
2
88%-10:16 AMWNW8:52 PMENE3:03 AMS237,249 mi
3
80%-10:49 AMWNW9:59 PMENE3:54 AMS235,346 mi
4
71%-11:20 AMW11:07 PME4:42 AMS233,575 mi
5
60%-11:49 AMW-5:30 AMS231,951 mi
6
50%12:15 AME12:19 PMW-6:18 AMS230,515 mi
7
36%1:24 AME12:50 PMWSW-7:08 AMS229,345 mi
8
25%2:35 AMESE1:24 PMWSW-8:00 AMS228,557 mi
9
15%3:47 AMESE2:04 PMWSW-8:56 AMS228,287 mi
10
8%5:00 AMESE2:51 PMWSW-9:55 AMS228,666 mi
11
3%6:09 AMESE3:45 PMWSW-10:57 AMS229,779 mi
12
0%7:12 AMESE4:47 PMWSW-12:00 PMS231,635 mi
13
1%8:06 AMESE5:53 PMWSW-1:00 PMS234,145 mi
14
4%8:51 AMESE7:01 PMWSW-1:56 PMS237,127 mi
15
9%9:28 AMESE8:06 PMWSW-2:47 PMS240,340 mi
16
16%10:00 AMESE9:09 PMWSW-3:34 PMS243,513 mi
17
24%10:27 AME10:09 PMW-4:17 PMS246,383 mi
18
33%10:53 AME11:08 PMW-4:59 PMS248,724 mi
19
42%11:17 AME--5:39 PMS250,358 mi
20
50%-12:05 AMW11:42 AME6:20 PMS251,172 mi
21
62%-1:02 AMWNW12:08 PMENE7:01 PMS251,122 mi
22
71%-2:00 AMWNW12:36 PMENE7:45 PMS250,235 mi
23
79%-2:59 AMWNW1:09 PMENE8:31 PMS248,604 mi
24
87%-3:59 AMWNW1:48 PMENE9:21 PMS246,380 mi
25
93%-4:58 AMWNW2:33 PMENE10:13 PMS243,760 mi
26
98%-5:54 AMWNW3:26 PMENE11:07 PMS240,968 mi
27
99%-6:47 AMWNW4:26 PMENE--
28
100%-7:33 AMWNW5:31 PMENE12:02 AMS238,229 mi
29
100%-8:14 AMWNW6:40 PMENE12:56 AMS235,742 mi
30
97%-8:50 AMWNW7:49 PMENE1:48 AMS233,652 mi
31
92%-9:22 AMWNW8:58 PME2:39 AMS232,039 mi

Humidity Comfort Levels in January 2021 in Mill Valley

Humidity Comfort Levels in January 2021 in Mill Valley18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM3 AM3 AM6 AM6 AM9 AM9 AM12 PM12 PM3 PM3 PM6 PM6 PM9 PM9 PM12 AM12 AMDecFeb
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The hourly reported humidity comfort level, categorized by dew point. The shaded overlays indicate night and civil twilight.

Wind Speed in January 2021 in Mill Valley

Wind Speed in January 2021 in Mill Valley1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310 mph0 mph10 mph10 mph20 mph20 mph30 mph30 mph40 mph40 mph50 mph50 mph60 mph60 mphDecFeb
The daily range of reported wind speeds (gray bars), with maximum gust speeds (red ticks).

Hourly Wind Speed in January 2021 in Mill Valley

Hourly Wind Speed in January 2021 in Mill Valley18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM3 AM3 AM6 AM6 AM9 AM9 AM12 PM12 PM3 PM3 PM6 PM6 PM9 PM9 PM12 AM12 AMDecFeb
0 mph calm 1 mph light air 4 mph light breeze 8 mph gentle breeze 13 mph moderate breeze 18 mph fresh breeze 25 mph strong breeze 31 mph near gale 39 mph gale 47 mph strong gale 55 mph storm 64 mph violent storm 73 mph hurricane force
The hourly reported wind speed, color coded into bands according to the Beaufort scale. The shaded overlays indicate night and civil twilight.

Hourly Wind Direction in 2021 in Mill Valley

Hourly Wind Direction in 2021 in Mill Valley18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM3 AM3 AM6 AM6 AM9 AM9 AM12 PM12 PM3 PM3 PM6 PM6 PM9 PM9 PM12 AM12 AMDecFeb
calmnortheastsouthwest
The hourly reported wind direction, color coded by compass point. The shaded overlays indicate night and civil twilight.

Atmospheric Pressure in January 2021 in Mill Valley

Atmospheric Pressure in January 2021 in Mill Valley18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313129.6 inHg29.6 inHg29.8 inHg29.8 inHg30.0 inHg30.0 inHg30.2 inHg30.2 inHg30.4 inHg30.4 inHgDecFeb
The daily range of atmospheric pressure (gray bars), as measured by the altimeter setting reported in e.g. a METAR report.

The details of the data sources used for this report can be found on the San Francisco International Airport page.

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