December 2020 Weather History in San Juan Puerto Rico

The data for this report comes from the Luis Muñoz Marín International Airport. See all nearby weather stations

This report shows the past weather for San Juan, providing a weather history for December 2020. It features all historical weather data series we have available, including the San Juan temperature history for December 2020. You can drill down from year to month and even day level reports by clicking on the graphs.

San Juan Temperature History December 2020

Temperature history in December 2020 in San Juan18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313166°F66°F68°F68°F70°F70°F72°F72°F74°F74°F76°F76°F78°F78°F80°F80°F82°F82°F84°F84°F86°F86°F88°F88°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 2020 in San Juan

Hourly Temperature in December 2020 in San Juan18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM3 AM3 AM6 AM6 AM9 AM9 AM12 PM12 PM3 PM3 PM6 PM6 PM9 PM9 PM12 AM12 AMNovJanwarm
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 2020 in San Juan

Cloud Cover in December 2020 in San Juan18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 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.

Daily Precipitation in December 2020 in San Juan

Daily Precipitation in December 2020 in San Juan1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310.0 in0.0 in0.5 in0.5 in1.0 in1.0 in1.5 in1.5 in2.0 in2.0 in2.5 in2.5 in3.0 in3.0 inNovJan
The daily measured quantity of liquid or liquid-equivalent precipitation.

Observed Weather in December 2020 in San Juan

Observed Weather in December 2020 in San Juan18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 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
Fri, Dec 4 Light Rain0.06 in-RA
Sat, Dec 5 Heavy Rain, Rain, Mist0.16 in+RA, RA, BR
Sun, Dec 6 Light Rain0.01 in-RA
Fri, Dec 11 Light Rain0.01 in-RA
Sat, Dec 12 Light Rain0.17 in-RA
Sun, Dec 13 Light Rain0.12 in-RA
Mon, Dec 14 Heavy Rain, Light Rain, Mist0.67 in+RA, -RA, BR
Wed, Dec 16 Light Rain0.04 in-RA
Thu, Dec 17 Light Rain0.00 in-RA
Fri, Dec 18 Light Rain0.18 in-RA
Sat, Dec 19 Light Rain0.49 in-RA
Sun, Dec 20 Heavy Rain, Rain, Light Rain, Mist0.33 in+RA, RA, -RA, BR
Mon, Dec 21 Light Rain0.01 in-RA
Wed, Dec 23 Light Rain0.16 in-RA
Thu, Dec 24 Thunderstorm with Heavy Rain, Heavy Rain, Rain, Light Rain, Mist1.82 in+TSRA, +RA, RA, -RA, BR
Fri, Dec 25 Light Rain0.15 in-RA
Mon, Dec 28 Light Rain0.00 in-RA
Tue, Dec 29 Light Rain0.06 in-RA
Wed, Dec 30 Light Rain0.06 in-RA
Thu, Dec 31 Light Rain0.13 in-RA

Hours of Daylight and Twilight in December 2020 in San Juan

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 2020 in San Juan

The solar day over the course of December 2020. 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 2020 in San Juan

Solar Elevation and Azimuth in December 2020 in San JuanDec112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 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 AMNovJan00101020203030404050001010202030304040
northeastsouthwest
Solar elevation and azimuth over the course of December 2020. 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 2020 in San Juan

Moon Rise, Set & Phases in December 2020 in San Juan18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMNovJanNov 305:30 AMNov 305:30 AMDec 1412:17 PMDec 1412:17 PMDec 2911:29 PMDec 2911:29 PM5:24 PM5:24 PM6:45 AM6:45 AM6:37 AM6:37 AM5:59 PM5:59 PM5:39 PM5:39 PM7:20 AM7:20 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 2020IlluminationMoonriseMoonsetMoonriseMeridian PassingDistance
1
99%-7:39 AMWNW6:54 PMENE12:51 AMN248,427 mi
2
97%-8:32 AMWNW7:45 PMENE1:43 AMN246,665 mi
3
92%-9:26 AMWNW8:40 PMENE2:36 AMN244,671 mi
4
86%-10:17 AMWNW9:36 PMENE3:29 AMN242,458 mi
5
77%-11:05 AMWNW10:34 PMENE4:22 AMN240,038 mi
6
68%-11:51 AMWNW11:31 PMENE5:14 AMS237,438 mi
7
50%-12:33 PMWNW-6:04 AMS234,715 mi
8
45%12:28 AME1:15 PMW-6:53 AMS231,981 mi
9
34%1:26 AME1:56 PMW-7:41 AMS229,400 mi
10
23%2:24 AME2:37 PMW-8:31 AMS227,187 mi
11
13%3:24 AME3:21 PMWSW-9:23 AMS225,587 mi
12
6%4:26 AMESE4:09 PMWSW-10:17 AMS224,832 mi
13
2%5:31 AMESE5:02 PMWSW-11:16 AMS225,094 mi
14
0%6:37 AMESE5:59 PMWSW-12:18 PMS226,437 mi
15
2%7:43 AMESE6:59 PMWSW-1:21 PMS228,788 mi
16
6%8:44 AMESE8:01 PMWSW-2:23 PMS231,940 mi
17
12%9:39 AMESE9:02 PMWSW-3:21 PMS235,587 mi
18
21%10:28 AMESE10:00 PMWSW-4:14 PMS239,389 mi
19
30%11:12 AMESE10:54 PMWSW-5:03 PMS243,022 mi
20
40%11:51 AMESE11:45 PMW-5:48 PMS246,213 mi
21
50%12:26 PME--6:30 PMS248,758 mi
22
59%-12:34 AMW1:00 PME7:10 PMS250,532 mi
23
69%-1:21 AMW1:34 PME7:50 PMS251,481 mi
24
77%-2:09 AMW2:07 PME8:31 PMS251,622 mi
25
85%-2:57 AMWNW2:43 PMENE9:13 PMS251,028 mi
26
91%-3:46 AMWNW3:21 PMENE9:58 PMN249,816 mi
27
96%-4:38 AMWNW4:03 PMENE10:45 PMN248,133 mi
28
99%-5:31 AMWNW4:49 PMENE11:36 PMN246,133 mi
29
100%-6:25 AMWNW5:39 PMENE--
30
100%-7:20 AMWNW6:33 PMENE12:29 AMN243,967 mi
31
99%-8:13 AMWNW7:30 PMENE1:24 AMN241,761 mi

Humidity Comfort Levels in December 2020 in San Juan

Humidity Comfort Levels in December 2020 in San Juan18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 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 2020 in San Juan

Wind Speed in December 2020 in San Juan1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310 mph0 mph10 mph10 mph20 mph20 mph30 mph30 mph40 mph40 mphNovJan
The daily range of reported wind speeds (gray bars), with maximum gust speeds (red ticks).

Hourly Wind Speed in December 2020 in San Juan

Hourly Wind Speed in December 2020 in San Juan18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 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 2020 in San Juan

Hourly Wind Direction in 2020 in San Juan18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 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 2020 in San Juan

Atmospheric Pressure in December 2020 in San Juan18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313129.8 inHg29.8 inHg29.9 inHg29.9 inHg30.0 inHg30.0 inHg30.1 inHg30.1 inHg30.2 inHg30.2 inHgNovJan
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 Luis Muñoz Marín International Airport page.

See all nearby weather stations

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