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January 2018 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 January 2018. It features all historical weather data series we have available, including the San Juan temperature history for January 2018. You can drill down from year to month and even day level reports by clicking on the graphs.

San Juan Temperature History January 2018

History:20202019JanFMAMJJASOND20172016
Temperature history in January 2018 in San Juan18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313168°F68°F70°F70°F72°F72°F74°F74°F76°F76°F78°F78°F80°F80°F82°F82°F84°F84°F86°F86°F88°F88°F90°F90°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 2018 in San Juan

History:20202019JanFMAMJJASOND20172016
Hourly Temperature in January 2018 in San Juan18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM3 AM3 AM6 AM6 AM9 AM9 AM12 PM12 PM3 PM3 PM6 PM6 PM9 PM9 PM12 AM12 AMDecFebwarmhot
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 2018 in San Juan

History:20202019JanFMAMJJASOND20172016
Cloud Cover in January 2018 in San Juan18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 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 2018 in San Juan

History:20202019JanFMAMJJASOND20172016
Daily Precipitation in January 2018 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 inDecFeb
The daily measured quantity of liquid or liquid-equivalent precipitation.

Snow Depth in January 2018 in San Juan

History:20202019JanFMAMJJASOND20172016
Snow Depth in January 2018 in San Juan1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310.0 in0.0 in0.2 in0.2 in0.4 in0.4 in0.6 in0.6 in0.8 in0.8 in1.0 in1.0 in1.2 in1.2 inDecFeb
The daily measured snow depth, where available.

Observed Weather in January 2018 in San Juan

History:20202019JanFMAMJJASOND20172016
Observed Weather in January 2018 in San Juan18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 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
Mon, Jan 8 Light Rain0.00 in-RA
Tue, Jan 9 Light Rain0.01 in-RA
Wed, Jan 10 Light Rain0.03 in-RA
Thu, Jan 11 Light Rain0.35 in-RA
Fri, Jan 12 Light Rain0.00 in-RA
Sat, Jan 13 Light Rain0.08 in-RA
Sun, Jan 14 Rain, Light Rain0.42 inRA, -RA
Mon, Jan 15 Rain, Light Rain0.37 inRA, -RA
Tue, Jan 16 Heavy Rain, Rain, Light Rain, Mist1.59 in+RA, RA, -RA, BR
Wed, Jan 17 Light Rain0.16 in-RA
Fri, Jan 19 Light Rain0.05 in-RA
Mon, Jan 22 Light Rain0.03 in-RA
Wed, Jan 24 Light Rain0.15 in-RA
Thu, Jan 25 Rain, Mist0.27 inRA, BR
Fri, Jan 26 Light Rain0.04 in-RA
Sat, Jan 27 Rain, Light Rain, Mist0.60 inRA, -RA, BR
Sun, Jan 28 Rain, Light Rain, Mist0.38 inRA, -RA, BR
Mon, Jan 29 Light Rain, Mist0.20 in-RA, BR
Tue, Jan 30 Light Rain0.01 in-RA
Wed, Jan 31 Light Rain0.19 in-RA, IWCA61

Hours of Daylight and Twilight in January 2018 in San Juan

History:20202019JanFMAMJJASOND20172016
Hours of Daylight and Twilight in January 2018 in San Juan1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hrDecFebnightnightdaydayJan 111 hr, 3 minJan 111 hr, 3 minJan 3111 hr, 20 minJan 3111 hr, 20 minJan 1111 hr, 7 minJan 1111 hr, 7 minJan 2111 hr, 12 minJan 2111 hr, 12 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 January 2018 in San Juan

History:20202019JanFMAMJJASOND20172016
Sunrise & Sunset with Twilight in January 2018 in San Juan1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031312 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AMDecFeb6:56 AM6:56 AMJan 15:59 PMJan 15:59 PM6:58 AM6:58 AMJan 316:17 PMJan 316:17 PM6:59 AM6:59 AMJan 196:10 PMJan 196:10 PM6:59 AM6:59 AMJan 116:05 PMJan 116:05 PM
The solar day over the course of January 2018. 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 2018 in San Juan

History:20202019JanFMAMJJASOND20172016
Solar Elevation and Azimuth in January 2018 in San JuanJan112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 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 AMDecFeb0010102020303040405000101020203030404050
northeastsouthwest
Solar elevation and azimuth over the course of January 2018. 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 2018 in San Juan

History:20202019JanFMAMJJASOND20172016
Moon Rise, Set & Phases in January 2018 in San Juan18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMDecFebJan 110:25 PMJan 110:25 PMJan 1610:18 PMJan 1610:18 PMJan 319:27 AMJan 319:27 AM5:47 PM5:47 PM7:17 AM7:17 AM6:30 AM6:30 AM5:57 PM5:57 PM5:32 PM5:32 PM6:55 AM6:55 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 2018IlluminationMoonriseMoonsetMoonriseMeridian PassingDistance
1
100%-6:13 AMWNW5:47 PMENE--
2
100%-7:17 AMWNW6:52 PMENE12:32 AMN221,610 mi
3
98%-8:18 AMWNW7:57 PMENE1:36 AMN222,655 mi
4
93%-9:13 AMWNW9:00 PMENE2:36 AMS224,937 mi
5
86%-10:03 AMWNW10:00 PME3:33 AMS228,180 mi
6
76%-10:49 AMW10:57 PME4:26 AMS232,023 mi
7
66%-11:32 AMW11:51 PME5:15 AMS236,093 mi
8
50%-12:12 PMW-6:02 AMS240,058 mi
9
45%12:43 AME12:51 PMW-6:47 AMS243,660 mi
10
35%1:34 AME1:31 PMW-7:32 AMS246,720 mi
11
26%2:24 AMESE2:10 PMWSW-8:17 AMS249,142 mi
12
18%3:14 AMESE2:52 PMWSW-9:03 AMS250,894 mi
13
11%4:04 AMESE3:35 PMWSW-9:49 AMS251,998 mi
14
5%4:53 AMESE4:21 PMWSW-10:37 AMS252,508 mi
15
2%5:42 AMESE5:08 PMWSW-11:25 AMS252,495 mi
16
0%6:30 AMESE5:57 PMWSW-12:14 PMS252,027 mi
17
0%7:16 AMESE6:47 PMWSW-1:02 PMS251,159 mi
18
2%8:00 AMESE7:38 PMWSW-1:49 PMS249,923 mi
19
7%8:42 AMESE8:28 PMWSW-2:35 PMS248,331 mi
20
12%9:23 AME9:19 PMW-3:21 PMS246,377 mi
21
20%10:02 AME10:10 PMW-4:06 PMS244,054 mi
22
29%10:41 AME11:02 PMW-4:51 PMS241,368 mi
23
39%11:21 AME11:55 PMW-5:37 PMS238,360 mi
24
50%12:03 PME--6:25 PMS235,122 mi
25
62%-12:50 AMW12:47 PMENE7:16 PMS231,814 mi
26
73%-1:48 AMWNW1:35 PMENE8:11 PMS228,666 mi
27
83%-2:49 AMWNW2:28 PMENE9:09 PMN225,967 mi
28
91%-3:51 AMWNW3:26 PMENE10:10 PMN224,025 mi
29
97%-4:55 AMWNW4:28 PMENE11:13 PMN223,112 mi
30
99%-5:56 AMWNW5:32 PMENE--
31
100%-6:55 AMWNW6:37 PMENE12:15 AMS223,400 mi

Humidity Comfort Levels in January 2018 in San Juan

History:20202019JanFMAMJJASOND20172016
Humidity Comfort Levels in January 2018 in San Juan18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 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 2018 in San Juan

History:20202019JanFMAMJJASOND20172016
Wind Speed in January 2018 in San Juan1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310 mph0 mph5 mph5 mph10 mph10 mph15 mph15 mph20 mph20 mph25 mph25 mph30 mph30 mph35 mph35 mph40 mph40 mphDecFeb
The daily range of reported wind speeds (gray bars), with maximum gust speeds (red ticks).

Hourly Wind Speed in January 2018 in San Juan

History:20202019JanFMAMJJASOND20172016
Hourly Wind Speed in January 2018 in San Juan18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 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 2018 in San Juan

History:20202019JanFMAMJJASOND20172016
Hourly Wind Direction in 2018 in San Juan18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 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 2018 in San Juan

History:20202019JanFMAMJJASOND20172016
Atmospheric Pressure in January 2018 in San Juan18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313129.90 inHg29.90 inHg29.95 inHg29.95 inHg30.00 inHg30.00 inHg30.05 inHg30.05 inHg30.10 inHg30.10 inHg30.15 inHg30.15 inHg30.20 inHg30.20 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 Luis Muñoz Marín International Airport page.

See all nearby weather stations

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