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April 1940 Weather History at Portland International Airport United States

This report shows the past weather for Portland International Airport, providing a weather history for April 1940. It features all historical weather data series we have available, including the Portland International Airport temperature history for April 1940. You can drill down from year to month and even day level reports by clicking on the graphs.

Portland International Airport Temperature History April 1940

History:19421941JFMAprMJJASOND
Temperature history in April 1940 at Portland International Airport181522293344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303030°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°F90°F90°F100°F100°FMarMay
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 April 1940 at Portland International Airport

History:19421941JFMAprMJJASOND
Hourly Temperature in April 1940 at Portland International Airport181522293344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 AM12 AM3 AM3 AM6 AM6 AM9 AM9 AM12 PM12 PM3 PM3 PM6 PM6 PM9 PM9 PM12 AM12 AMMarMaycoldcool
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 April 1940 at Portland International Airport

History:19421941JFMAprMJJASOND
Cloud Cover in April 1940 at Portland International Airport181522293344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 AM12 AM3 AM3 AM6 AM6 AM9 AM9 AM12 PM12 PM3 PM3 PM6 PM6 PM9 PM9 PM12 AM12 AMMarMay
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.

Observed Weather in April 1940 at Portland International Airport

History:19421941JFMAprMJJASOND
Observed Weather in April 1940 at Portland International Airport181522293344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 AM12 AM3 AM3 AM6 AM6 AM9 AM9 AM12 PM12 PM3 PM3 PM6 PM6 PM9 PM9 PM12 AM12 AMMarMay
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
Wed, Apr 3 Thunderstorm, Light RainTS, IWC17, -RA, IWC61
Thu, Apr 4 Light Rain, Drizzle, Haze, Patches of Fog, Shallow Patches of Fog-RA, IWC61, DZ, IWC05, IWC11, MIBCFG
Sat, Apr 6 Light Rain, Drizzle, Haze, Patches of Fog, Shallow Patches of Fog-RA, IWC61, DZ, IWC05, IWC11, MIBCFG
Sun, Apr 7 Light Rain, Showers of Light Rain, Drizzle, Haze, Fog, Sky-Obscuring Fog-RA, IWC61, -SHRA, IWC80, DZ, IWC05, FG, IWC45
Mon, Apr 8 Light Rain, Drizzle, Haze, Fog, Sky-Obscuring Fog-RA, IWC61, DZ, IWC05, FG, IWC45
Tue, Apr 9 Showers of RainSHRA, IWC81
Wed, Apr 10 Drizzle, Haze, Smoke, Fog, Fog and Smoke, Patches of Fog, Shallow Patches of Fog, Sky-Obscuring FogDZ, IWC05, IWC04, FG, FGFU, IWC11, MIBCFG, IWC45
Thu, Apr 11 Drizzle, Haze, Patches of Fog, Shallow Patches of FogDZ, IWC05, IWC11, MIBCFG
Sun, Apr 14 Smoke, Patches of Fog, Shallow Patches of Fog, Shallow Patches of Fog and SmokeIWC04, IWC11, MIBCFG, MIBCFGFU
Tue, Apr 16 Drizzle, HazeDZ, IWC05
Wed, Apr 17 Light Rain, Showers of Light Rain, Smoke, Patches of Fog, Shallow Patches of Fog, Shallow Patches of Fog and Smoke-RA, IWC61, -SHRA, IWC80, IWC04, IWC11, MIBCFG, MIBCFGFU
Fri, Apr 19 Light Rain, Showers of Light Rain, Drizzle, Haze-RA, IWC61, -SHRA, IWC80, DZ, IWC05
Sat, Apr 20 Light Drizzle-DZ, IWC51
Sun, Apr 21 Patches of Fog, Shallow Patches of FogIWC11, MIBCFG
Mon, Apr 22 Light Rain-RA, IWC61
Tue, Apr 23 Light Rain, Showers of Light Rain, Drizzle, Haze-RA, IWC61, -SHRA, IWC80, DZ, IWC05
Wed, Apr 24 Light Rain, Drizzle, Light Drizzle, Haze, Smoke, Patches of Fog, Shallow Patches of Fog, Shallow Patches of Fog and Smoke-RA, IWC61, DZ, -DZ, IWC51, IWC05, IWC04, IWC11, MIBCFG, MIBCFGFU
Thu, Apr 25 Light Rain, Drizzle, Light Drizzle, Haze-RA, IWC61, DZ, -DZ, IWC51, IWC05
Fri, Apr 26 Light Rain, Light Drizzle-RA, IWC61, -DZ, IWC51
Sat, Apr 27 Light Rain, Showers of Light Rain, Light Drizzle-RA, IWC61, -SHRA, IWC80, -DZ, IWC51
Sun, Apr 28 Rain, Showers of Light Rain, Light DrizzleRA, IWC63, -SHRA, IWC80, -DZ, IWC51
Mon, Apr 29 Patches of Fog, Shallow Patches of FogIWC11, MIBCFG
Tue, Apr 30 Light Rain, Fog, Sky-Obscuring Fog-RA, IWC61, FG, IWC45

Hours of Daylight and Twilight in April 1940 at Portland International Airport

History:19421941JFMAprMJJASOND
Hours of Daylight and Twilight in April 1940 at Portland International Airport18152229334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hrMarMaynightnightdaydayApr 112 hr, 48 minApr 112 hr, 48 minApr 3014 hr, 16 minApr 3014 hr, 16 minApr 1113 hr, 20 minApr 1113 hr, 20 minApr 2113 hr, 50 minApr 2113 hr, 50 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 April 1940 at Portland International Airport

History:19421941JFMAprMJJASOND
Sunrise & Sunset with Twilight in April 1940 at Portland International Airport18152229334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930302 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AMMarMay4:59 AM4:59 AMApr 307:16 PMApr 307:16 PM5:50 AM5:50 AMApr 16:38 PMApr 16:38 PM5:31 AM5:31 AMApr 116:51 PMApr 116:51 PM5:14 AM5:14 AMApr 217:04 PMApr 217:04 PM
The solar day over the course of April 1940. 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 April 1940 at Portland International Airport

History:19421941JFMAprMJJASOND
Solar Elevation and Azimuth in April 1940 at Portland International AirportApr3344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 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 AMMarMay001010202030304040500010102020303040405050
northeastsouthwest
Solar elevation and azimuth over the course of April 1940. 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 April 1940 at Portland International Airport

History:19421941JFMAprMJJASOND
Moon Rise, Set & Phases in April 1940 at Portland International Airport181522293344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMMarMayApr 712:18 PMApr 712:18 PMApr 218:37 PMApr 218:37 PMMay 74:07 AMMay 74:07 AM5:34 AM5:34 AM6:57 PM6:57 PM6:51 PM6:51 PM5:38 AM5:38 AM5:09 AM5:09 AM7:48 PM7:48 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.
Apr 1940IlluminationMoonriseMoonsetMoonriseMeridian PassingDistance
1
31%2:45 AMESE1:05 PMWSW-7:55 AMS248,500 mi
2
22%3:18 AMESE2:03 PMWSW-8:40 AMS250,463 mi
3
15%3:48 AMESE3:02 PMW-9:24 AMS251,739 mi
4
8%4:15 AME4:01 PMW-10:07 AMS252,371 mi
5
4%4:42 AME4:59 PMW-10:49 AMS252,431 mi
6
1%5:08 AME5:58 PMW-11:31 AMS251,995 mi
7
0%5:34 AME6:57 PMWNW-12:14 PMS251,131 mi
8
1%6:03 AMENE7:57 PMWNW-12:57 PMS249,893 mi
9
4%6:34 AMENE8:56 PMWNW-1:43 PMS248,311 mi
10
9%7:09 AMENE9:55 PMWNW-2:30 PMS246,400 mi
11
16%7:49 AMENE10:52 PMWNW-3:19 PMS244,163 mi
12
24%8:34 AMENE11:46 PMWNW-4:10 PMS241,609 mi
13
34%9:26 AMENE--5:02 PMS238,771 mi
14
45%-12:36 AMWNW10:25 AMENE5:55 PMS235,722 mi
15
50%-1:21 AMWNW11:29 AMENE6:48 PMS232,596 mi
16
68%-2:02 AMWNW12:37 PMENE7:41 PMS229,586 mi
17
78%-2:40 AMWNW1:49 PMENE8:35 PMS226,940 mi
18
88%-3:15 AMW3:03 PME9:28 PMS224,935 mi
19
95%-3:49 AMW4:19 PME10:23 PMS223,829 mi
20
99%-4:24 AMW5:35 PME11:18 PMS223,810 mi
21
100%-5:00 AMWSW6:51 PMESE--
22
100%-5:38 AMWSW8:05 PMESE12:15 AMS224,949 mi
23
98%-6:21 AMWSW9:15 PMESE1:13 AMS227,175 mi
24
93%-7:08 AMWSW10:18 PMESE2:12 AMS230,282 mi
25
86%-8:01 AMWSW11:14 PMESE3:09 AMS233,966 mi
26
77%-8:57 AMWSW-4:05 AMS237,881 mi
27
68%12:02 AMESE9:55 AMWSW-4:59 AMS241,692 mi
28
50%12:43 AMESE10:55 AMWSW-5:49 AMS245,115 mi
29
47%1:19 AMESE11:54 AMWSW-6:36 AMS247,941 mi
30
38%1:50 AMESE12:54 PMWSW-7:21 AMS250,038 mi

Humidity Comfort Levels in April 1940 at Portland International Airport

History:19421941JFMAprMJJASOND
Humidity Comfort Levels in April 1940 at Portland International Airport181522293344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 AM12 AM3 AM3 AM6 AM6 AM9 AM9 AM12 PM12 PM3 PM3 PM6 PM6 PM9 PM9 PM12 AM12 AMMarMay
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 April 1940 at Portland International Airport

History:19421941JFMAprMJJASOND
Wind Speed in April 1940 at Portland International Airport18152229334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300 mph0 mph10 mph10 mph20 mph20 mph30 mph30 mph40 mph40 mphMarMay
The daily range of reported wind speeds (gray bars), with maximum gust speeds (red ticks).

Hourly Wind Speed in April 1940 at Portland International Airport

History:19421941JFMAprMJJASOND
Hourly Wind Speed in April 1940 at Portland International Airport181522293344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 AM12 AM3 AM3 AM6 AM6 AM9 AM9 AM12 PM12 PM3 PM3 PM6 PM6 PM9 PM9 PM12 AM12 AMMarMay
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 1940 at Portland International Airport

History:19421941JFMAprMJJASOND
Hourly Wind Direction in 1940 at Portland International Airport181522293344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 AM12 AM3 AM3 AM6 AM6 AM9 AM9 AM12 PM12 PM3 PM3 PM6 PM6 PM9 PM9 PM12 AM12 AMMarMay
calmnortheastsouthwest
The hourly reported wind direction, color coded by compass point. The shaded overlays indicate night and civil twilight.

Reports by Month

Reports by Month at Portland International Airport1940195019601970198019902000201020201940194019411941194219421943194319441944194719471948194819491949195019501951195119521952195319531954195419551955195619561957195719581958195919591960196019611961196219621963196319641964196519651966196619671967196819681969196919701970197119711972197219731973197419741975197519761976197719771978197819791979198019801981198119821982198319831984198419851985198619861987198719881988198919891990199019911991199219921993199319941994199519951996199619971997199819981999199920002000200120012002200220032003200420042005200520062006200720072008200820092009201020102011201120122012201320132014201420152015201620162017201720182018201920192020202020212021202220222023202320242024
METARISDboth
The number of reports per month over the entire history of this station.

Number of Reports by Day in April 1940 at Portland International Airport Spring 1940

Number of Reports by Day in April 1940 at Portland International Airport18152229334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300024244848MarMay
regularspecialcorrection
The number of reports per day.

Reports by Hour in April 1940 at Portland International Airport Spring 1940

Reports by Hour in April 1940 at Portland International Airport181522293344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 AM12 AM3 AM3 AM6 AM6 AM9 AM9 AM12 PM12 PM3 PM3 PM6 PM6 PM9 PM9 PM12 AM12 AMMarMay
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 Portland International Airport in April 1940.

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.

Disclaimer

The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data is prone to errors, outages, and other defects. We assume no responsibility for any decisions made on the basis of the content presented on this site.

We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. While having the tremendous advantages of temporal and spatial completeness, these reconstructions: (1) are based on computer models that may have model-based errors, (2) are coarsely sampled on a 50 km grid and are therefore unable to reconstruct the local variations of many microclimates, and (3) have particular difficulty with the weather in some coastal areas, especially small islands.

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