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December 2025 Weather History at San Carlos Airport California, United States

This report shows the past weather for San Carlos Airport, providing a weather history for December 2025. It features all historical weather data series we have available, including the San Carlos Airport temperature history for December 2025. You can drill down from year to month and even day level reports by clicking on the graphs.

San Carlos Airport Temperature History December 2025

History:JFMAMJJASONDec2024202320222021
Temperature history in December 2025 at San Carlos Airport18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313135°F35°F40°F40°F45°F45°F50°F50°F55°F55°F60°F60°F65°F65°F70°F70°FNovJan
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 December 2025 at San Carlos Airport

History:JFMAMJJASONDec2024202320222021
Hourly Temperature in December 2025 at San Carlos Airport18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM3 AM3 AM6 AM6 AM9 AM9 AM12 PM12 PM3 PM3 PM6 PM6 PM9 PM9 PM12 AM12 AMNovJancoldcoolvery cold
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 December 2025 at San Carlos Airport

History:JFMAMJJASONDec2024202320222021
Cloud Cover in December 2025 at San Carlos Airport18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM3 AM3 AM6 AM6 AM9 AM9 AM12 PM12 PM3 PM3 PM6 PM6 PM9 PM9 PM12 AM12 AMNovJan
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.
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Observed Weather in December 2025 at San Carlos Airport

History:JFMAMJJASONDec2024202320222021
Observed Weather in December 2025 at San Carlos Airport18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM3 AM3 AM6 AM6 AM9 AM9 AM12 PM12 PM3 PM3 PM6 PM6 PM9 PM9 PM12 AM12 AMNovJan
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
Mon, Dec 1 Haze, MistHZ, BR
Tue, Dec 2 HazeHZ
Wed, Dec 3 MistBR
Fri, Dec 5 MistBR
Sat, Dec 6 Haze, MistHZ, BR
Sun, Dec 7 MistBR
Mon, Dec 8 MistBR
Tue, Dec 9 MistBR
Wed, Dec 10 MistBR
Thu, Dec 11 MistBR
Fri, Dec 12 MistBR
Sat, Dec 13 MistBR
Sun, Dec 14 Fog, MistFG, BR
Mon, Dec 15 Fog, MistFG, BR
Tue, Dec 16 MistBR
Wed, Dec 17 Light Rain, Mist-RA, BR
Thu, Dec 18 Fog, MistFG, BR
Fri, Dec 19 MistBR
Sat, Dec 20 MistBR
Sun, Dec 21 Light Rain, Mist-RA, BR
Mon, Dec 22 Rain, Light Rain, MistRA, -RA, BR
Tue, Dec 23 MistBR
Wed, Dec 24 Haze, MistHZ, BR
Thu, Dec 25 Haze, MistHZ, BR
Wed, Dec 31 Light Rain, Mist, Showers in the Vicinity-RA, BR, VCSH

Hours of Daylight and Twilight in December 2025 at San Carlos Airport

History:JFMAMJJASONDec2024202320222021
Hours of Daylight and Twilight in December 2025 at San Carlos Airport1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hrNovJanDec 219 hr, 34 minDec 219 hr, 34 minnightnightdaydayDec 19 hr, 46 minDec 19 hr, 46 minDec 319 hr, 37 minDec 319 hr, 37 minDec 119 hr, 37 minDec 119 hr, 37 min
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 December 2025 at San Carlos Airport

History:JFMAMJJASONDec2024202320222021
Sunrise & Sunset with Twilight in December 2025 at San Carlos Airport18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 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 AMNovJan7:05 AM7:05 AMDec 14:50 PMDec 14:50 PM7:23 AM7:23 AMDec 315:01 PMDec 315:01 PM7:13 AM7:13 AMDec 114:51 PMDec 114:51 PM7:20 AM7:20 AMDec 214:54 PMDec 214:54 PM
The solar day over the course of December 2025. 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 December 2025 at San Carlos Airport

History:JFMAMJJASONDec2024202320222021
Solar Elevation and Azimuth in December 2025 at San Carlos AirportDec112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 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 AMNovJan0010102020001010202030
northeastsouthwest
Solar elevation and azimuth over the course of December 2025. 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 December 2025 at San Carlos Airport

History:JFMAMJJASONDec2024202320222021
Moon Rise, Set & Phases in December 2025 at San Carlos Airport18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMNovJanDec 43:15 PMDec 43:15 PMDec 195:44 PMDec 195:44 PMJan 32:04 AMJan 32:04 AM4:25 PM4:25 PM8:19 AM8:19 AM7:21 AM7:21 AM4:26 PM4:26 PM4:14 PM4:14 PM8:00 AM8:00 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.
Dec 2025IlluminationMoonriseMoonsetMoonriseMeridian PassingDistance
1
89%-3:09 AMWNW2:17 PMENE9:16 PMS224,742 mi
2
96%-4:25 AMWNW2:51 PMENE10:13 PMS222,691 mi
3
99%-5:44 AMWNW3:33 PMENE11:15 PMS221,824 mi
4
100%-7:05 AMNW4:25 PMNE--
5
100%-8:19 AMNW5:30 PMNE12:21 AMS222,291 mi
6
97%-9:24 AMNW6:42 PMNE1:28 AMS224,067 mi
7
91%-10:15 AMWNW7:57 PMENE2:32 AMS226,947 mi
8
83%-10:55 AMWNW9:10 PMENE3:31 AMS230,602 mi
9
74%-11:27 AMWNW10:19 PMENE4:23 AMS234,652 mi
10
64%-11:54 AMWNW11:24 PME5:10 AMS238,732 mi
11
50%-12:18 PMW-5:53 AMS242,542 mi
12
43%12:25 AME12:40 PMW-6:34 AMS245,859 mi
13
33%1:25 AME1:02 PMW-7:14 AMS248,541 mi
14
24%2:24 AMESE1:25 PMWSW-7:55 AMS250,521 mi
15
16%3:24 AMESE1:50 PMWSW-8:37 AMS251,794 mi
16
10%4:24 AMESE2:20 PMWSW-9:22 AMS252,400 mi
17
5%5:25 AMESE2:55 PMWSW-10:10 AMS252,413 mi
18
1%6:24 AMSE3:37 PMSW-11:00 AMS251,915 mi
19
0%7:21 AMSE4:26 PMSW-11:53 AMS250,990 mi
20
1%8:12 AMSE5:22 PMSW-12:47 PMS249,704 mi
21
3%8:57 AMSE6:23 PMWSW-1:40 PMS248,103 mi
22
8%9:35 AMESE7:26 PMWSW-2:30 PMS246,210 mi
23
14%10:07 AMESE8:31 PMWSW-3:19 PMS244,034 mi
24
22%10:35 AMESE9:36 PMWSW-4:05 PMS241,581 mi
25
32%11:00 AME10:40 PMW-4:49 PMS238,870 mi
26
42%11:24 AME11:46 PMW-5:33 PMS235,958 mi
27
50%11:49 AME--6:18 PMS232,951 mi
28
65%-12:53 AMW12:15 PMENE7:06 PMS230,021 mi
29
76%-2:04 AMWNW12:46 PMENE7:58 PMS227,394 mi
30
86%-3:19 AMWNW1:22 PMENE8:55 PMS225,342 mi
31
93%-4:36 AMWNW2:08 PMNE9:57 PMS224,135 mi

Humidity Comfort Levels in December 2025 at San Carlos Airport

History:JFMAMJJASONDec2024202320222021
Humidity Comfort Levels in December 2025 at San Carlos Airport18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM3 AM3 AM6 AM6 AM9 AM9 AM12 PM12 PM3 PM3 PM6 PM6 PM9 PM9 PM12 AM12 AMNovJan
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 December 2025 at San Carlos Airport

History:JFMAMJJASONDec2024202320222021
Wind Speed in December 2025 at San Carlos Airport1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310 mph0 mph50 mph50 mph100 mph100 mph150 mph150 mph200 mph200 mph250 mph250 mphNovJan
The daily range of reported wind speeds (gray bars), with maximum gust speeds (red ticks).

Hourly Wind Speed in December 2025 at San Carlos Airport

History:JFMAMJJASONDec2024202320222021
Hourly Wind Speed in December 2025 at San Carlos Airport18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM3 AM3 AM6 AM6 AM9 AM9 AM12 PM12 PM3 PM3 PM6 PM6 PM9 PM9 PM12 AM12 AMNovJan
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 2025 at San Carlos Airport

History:JFMAMJJASONDec2024202320222021
Hourly Wind Direction in 2025 at San Carlos Airport18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM3 AM3 AM6 AM6 AM9 AM9 AM12 PM12 PM3 PM3 PM6 PM6 PM9 PM9 PM12 AM12 AMNovJan
calmnortheastsouthwest
The hourly reported wind direction, color coded by compass point. The shaded overlays indicate night and civil twilight.

Atmospheric Pressure in December 2025 at San Carlos Airport

History:JFMAMJJASONDec2024202320222021
Atmospheric Pressure in December 2025 at San Carlos Airport18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313129.4 inHg29.4 inHg29.6 inHg29.6 inHg29.8 inHg29.8 inHg30.0 inHg30.0 inHg30.2 inHg30.2 inHg30.4 inHg30.4 inHgNovJan
The daily range of atmospheric pressure (gray bars), as measured by the altimeter setting reported in e.g. a METAR report.

Reports by Month

Reports by Month at San Carlos Airport1940195019601970198019902000201020201983198319841984198519851986198619871987198819881989198919901990199119911992199219931993199419941995199519961996199719971998199819991999200020002001200120022002200320032004200420052005200620062007200720082008200920092010201020112011201220122013201320142014201520152016201620172017201820182019201920202020202120212022202220232023202420242025202520262026
METARISDboth
The number of reports per month over the entire history of this station.

Number of Reports by Day in December 2025 at San Carlos Airport Winter 2025

Number of Reports by Day in December 2025 at San Carlos Airport1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310024244848NovJan
regularspecialcorrection
The number of reports per day.

Reports by Hour in December 2025 at San Carlos Airport Winter 2025

Reports by Hour in December 2025 at San Carlos Airport18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM3 AM3 AM6 AM6 AM9 AM9 AM12 PM12 PM3 PM3 PM6 PM6 PM9 PM9 PM12 AM12 AMNovJan
regularspecialcorrection
Indication of what types of reports were recorded during each hour.

This report graphically illustrates the historical weather reports recorded by the weather station at San Carlos Airport in December 2025.

METAR Reports

Airport weather stations throughout the world routinely issue METAR weather reports . Such reports are used by pilots, air traffic controllers, meteorologists, climatologists, and other researchers. They are published via radio transmission and on the internet. We have been collecting and archiving published METAR reports since 2011, and have found third-party sources for archived reports from years prior to that.

ISD Reports

The Integrated Surface Database (ISD), maintained and published by NOAA's National Center for Environmental Information , consists of hourly and synoptic weather reports from a variety of sources. We use ISD data to complement and backfill for our METAR archive.

Other Data

The sources for the averages shown in the daily temperature chart are discussed in greater detail on this station's Averages Report.

All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Algorithms 2nd Edition , by Jean Meeus.

Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database .

Time zones for airports and weather stations are provided by AskGeo.com .

Maps are © OpenStreetMap contributors.

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