January 2012 Weather History at San Marcos Municipal Airport United States

This report shows the past weather for San Marcos Municipal Airport, providing a weather history for January 2012. It features all historical weather data series we have available, including the San Marcos Municipal Airport temperature history for January 2012. You can drill down from year to month and even day level reports by clicking on the graphs.

San Marcos Municipal Airport Temperature History January 2012

Temperature history in January 2012 at San Marcos Municipal Airport18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313120°F20°F30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°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 2012 at San Marcos Municipal Airport

Hourly Temperature in January 2012 at San Marcos Municipal Airport18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM3 AM3 AM6 AM6 AM9 AM9 AM12 PM12 PM3 PM3 PM6 PM6 PM9 PM9 PM12 AM12 AMDecFebvery coldcoldcool
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 2012 at San Marcos Municipal Airport

Cloud Cover in January 2012 at San Marcos Municipal Airport18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 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 2012 at San Marcos Municipal Airport

Daily Precipitation in January 2012 at San Marcos Municipal Airport1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310.0 in0.0 in0.5 in0.5 in1.0 in1.0 in1.5 in1.5 inDecFeb
The daily measured quantity of liquid or liquid-equivalent precipitation.

Observed Weather in January 2012 at San Marcos Municipal Airport

Observed Weather in January 2012 at San Marcos Municipal Airport18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 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
Fri, Jan 6 Fog, MistFG, BR
Sat, Jan 7 Fog, MistFG, BR
Mon, Jan 9 Thunderstorm, Thunderstorm in the Vicinity, Rain, Showers of Rain, Light Rain0.61 inTS, VCTS, RA, SHRA, -RA
Mon, Jan 16 Light Drizzle, Mist-DZ, BR
Fri, Jan 20 Fog, MistFG, BR
Sun, Jan 22 Haze, MistHZ, BR
Tue, Jan 24 Thunderstorm, Rain, Fog, MistTS, RA, FG, BR
Wed, Jan 25 Thunderstorm, Thunderstorm in the Vicinity, Thunderstorm with RainTS, VCTS, TSRA
Mon, Jan 30 Rain, Mist0.52 inRA, BR
Tue, Jan 31 Fog, Mist0.03 inFG, BR

Hours of Daylight and Twilight in January 2012 at San Marcos Municipal Airport

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 2012 at San Marcos Municipal Airport

The solar day over the course of January 2012. 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 2012 at San Marcos Municipal Airport

Solar Elevation and Azimuth in January 2012 at San Marcos Municipal AirportJan112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 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 AMDecFeb00101020203030400010102020303040
northeastsouthwest
Solar elevation and azimuth over the course of January 2012. 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 2012 at San Marcos Municipal Airport

Moon Rise, Set & Phases in January 2012 at San Marcos Municipal Airport18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMDecFebJan 91:31 AMJan 91:31 AMJan 231:40 AMJan 231:40 AM5:31 PM5:31 PM7:33 AM7:33 AM7:26 AM7:26 AM6:43 PM6:43 PM
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 2012IlluminationMoonriseMoonsetMoonriseMeridian PassingDistance
1
50%-12:40 AMW12:16 PMENE6:53 PMS251,129 mi
2
67%-1:33 AMWNW12:49 PMENE7:36 PMS251,374 mi
3
76%-2:26 AMWNW1:26 PMENE8:21 PMS250,799 mi
4
84%-3:20 AMWNW2:05 PMENE9:08 PMS249,499 mi
5
90%-4:14 AMWNW2:50 PMENE9:58 PMS247,622 mi
6
95%-5:07 AMWNW3:39 PMENE10:49 PMS245,349 mi
7
99%-5:59 AMWNW4:33 PMENE11:42 PMS242,876 mi
8
100%-6:48 AMWNW5:31 PMENE--
9
100%-7:33 AMWNW6:31 PMENE12:34 AMS240,390 mi
10
99%-8:15 AMWNW7:32 PMENE1:25 AMS238,048 mi
11
95%-8:54 AMWNW8:34 PME2:15 AMS235,960 mi
12
89%-9:31 AMW9:35 PME3:04 AMS234,183 mi
13
81%-10:07 AMW10:38 PME3:53 AMS232,729 mi
14
72%-10:44 AMW11:41 PME4:41 AMS231,582 mi
15
60%-11:22 AMWSW-5:32 AMS230,721 mi
16
50%12:45 AMESE12:03 PMWSW-6:24 AMS230,138 mi
17
37%1:50 AMESE12:48 PMWSW-7:19 AMS229,856 mi
18
26%2:55 AMESE1:39 PMWSW-8:17 AMS229,927 mi
19
16%3:59 AMESE2:35 PMWSW-9:17 AMS230,426 mi
20
8%4:59 AMESE3:36 PMWSW-10:17 AMS231,423 mi
21
3%5:54 AMESE4:39 PMWSW-11:16 AMS232,958 mi
22
0%6:43 AMESE5:42 PMWSW-12:12 PMS235,014 mi
23
0%7:26 AMESE6:43 PMWSW-1:04 PMS237,505 mi
24
3%8:04 AMESE7:43 PMW-1:53 PMS240,279 mi
25
7%8:39 AME8:40 PMW-2:39 PMS243,136 mi
26
13%9:12 AME9:35 PMW-3:22 PMS245,848 mi
27
21%9:44 AME10:29 PMW-4:05 PMS248,191 mi
28
30%10:15 AME11:23 PMWNW-4:47 PMS249,961 mi
29
39%10:48 AMENE--5:30 PMS251,000 mi
30
50%-12:16 AMWNW11:23 AMENE6:14 PMS251,204 mi
31
58%-1:10 AMWNW12:01 PMENE7:01 PMS250,539 mi

Humidity Comfort Levels in January 2012 at San Marcos Municipal Airport

Humidity Comfort Levels in January 2012 at San Marcos Municipal Airport18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 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 2012 at San Marcos Municipal Airport

Wind Speed in January 2012 at San Marcos Municipal Airport1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310 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 2012 at San Marcos Municipal Airport

Hourly Wind Speed in January 2012 at San Marcos Municipal Airport18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 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 2012 at San Marcos Municipal Airport

Hourly Wind Direction in 2012 at San Marcos Municipal Airport18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 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 2012 at San Marcos Municipal Airport

Atmospheric Pressure in January 2012 at San Marcos Municipal Airport18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313129.0 inHg29.0 inHg29.5 inHg29.5 inHg30.0 inHg30.0 inHg30.5 inHg30.5 inHg31.0 inHg31.0 inHgDecFeb
The daily range of atmospheric pressure (gray bars), as measured by the altimeter setting reported in e.g. a METAR report.

Number of Reports by Day in January 2012 at San Marcos Municipal Airport Winter 2012

Number of Reports by Day in January 2012 at San Marcos Municipal Airport181522291122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930303131005050100100DecFeb
regularspecialcorrection
The number of reports per day.

Reports by Hour in January 2012 at San Marcos Municipal Airport Winter 2012

Reports by Hour in January 2012 at San Marcos Municipal Airport18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM3 AM3 AM6 AM6 AM9 AM9 AM12 PM12 PM3 PM3 PM6 PM6 PM9 PM9 PM12 AM12 AMDecFeb
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 Marcos Municipal Airport in January 2012.

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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