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March Weather at Arcata-Eureka Airport California, United States

Daily high temperatures are around 56°F, rarely falling below 50°F or exceeding 63°F.

Daily low temperatures are around 43°F, rarely falling below 34°F or exceeding 51°F.

For reference, on September 10, the hottest day of the year, temperatures at Arcata-Eureka Airport typically range from 50°F to 65°F, while on December 22, the coldest day of the year, they range from 41°F to 54°F.

Average High and Low Temperature in March at Arcata-Eureka Airport

The daily average high (red line) and low (blue line) temperature, with 25th to 75th and 10th to 90th percentile bands. The thin dotted lines are the corresponding average perceived temperatures.

The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on March. The horizontal axis is the day, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.

Average Hourly Temperature in March at Arcata-Eureka Airport

Average Hourly Temperature in March at Arcata-Eureka AirportMar112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 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 AMFebAprvery 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 average hourly temperature, color coded into bands. The shaded overlays indicate night and civil twilight.

Ancud, Chile (6,536 miles away) and Cygnet, Tasmania, Australia (8,018 miles) are the far-away foreign places with temperatures most similar to Arcata-Eureka Airport (view comparison).

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The month of March at Arcata-Eureka Airport experiences gradually decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 67% to 61%.

The clearest day of the month is March 31, with clear, mostly clear, or partly cloudy conditions 39% of the time.

For reference, on January 9, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 68%, while on August 2, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 89%.

Cloud Cover Categories in March at Arcata-Eureka Airport

Cloud Cover Categories in March at Arcata-Eureka AirportMar11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%FebAprMar 133%Mar 133%Mar 3139%Mar 3139%Mar 1134%Mar 1134%Mar 2137%Mar 2137%clearmostly clearpartly cloudymostly cloudyovercast
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. At Arcata-Eureka Airport, the chance of a wet day over the course of March is very rapidly decreasing, starting the month at 46% and ending it at 35%.

For reference, the year's highest daily chance of a wet day is 47% on December 3, and its lowest chance is 1% on August 2.

Probability of Precipitation in March at Arcata-Eureka Airport

Probability of Precipitation in March at Arcata-Eureka AirportMar11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%0%5%5%10%10%15%15%20%20%25%25%30%30%35%35%40%40%45%45%50%50%FebAprMar 146%Mar 146%Mar 3135%Mar 3135%Mar 1144%Mar 1144%Mar 2140%Mar 2140%rain
The percentage of days in which various types of precipitation are observed, excluding trace quantities: rain alone, snow alone, and mixed (both rain and snow fell in the same day).

Rainfall

To show variation within the month and not just the monthly total, we show the rainfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day rainfall during March at Arcata-Eureka Airport is very rapidly decreasing, starting the month at 6.7 inches, when it rarely exceeds 11.9 inches or falls below 2.5 inches, and ending the month at 4.5 inches, when it rarely exceeds 9.4 inches or falls below 1.1 inches.

Average Monthly Rainfall in March at Arcata-Eureka Airport

The average rainfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The thin dotted line is the corresponding average snowfall.

Over the course of March at Arcata-Eureka Airport, the length of the day is rapidly increasing. From the start to the end of the month, the length of the day increases by 1 hour, 22 minutes, implying an average daily increase of 2 minutes, 44 seconds, and weekly increase of 19 minutes, 7 seconds.

The shortest day of the month is March 1, with 11 hours, 19 minutes of daylight and the longest day is March 31, with 12 hours, 41 minutes of daylight.

Hours of Daylight and Twilight in March at Arcata-Eureka Airport

Hours of Daylight and Twilight in March at Arcata-Eureka AirportMar11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hrFebAprMar 1912 hr, 8 minMar 1912 hr, 8 minnightnightdaydayMar 111 hr, 19 minMar 111 hr, 19 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.

The earliest sunrise of the month at Arcata-Eureka Airport is 6:36 AM on March 9 and the latest sunrise is 58 minutes later at 7:35 AM on March 10.

The earliest sunset is 6:08 PM on March 1 and the latest sunset is 1 hour, 33 minutes later at 7:41 PM on March 31.

Daylight saving time (DST) starts at 3:00 AM on March 10, 2024, shifting sunrise and sunset to be an hour later.

For reference, on June 20, the longest day of the year, the Sun rises at 5:44 AM and sets 15 hours, 8 minutes later, at 8:51 PM, while on December 21, the shortest day of the year, it rises at 7:38 AM and sets 9 hours, 14 minutes later, at 4:51 PM.

Sunrise & Sunset with Twilight and Daylight Saving Time in March at Arcata-Eureka Airport

Sunrise & Sunset with Twilight and Daylight Saving Time in March at Arcata-Eureka AirportMar11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031312 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMFebApr6:36 AM6:36 AMMar 96:17 PMMar 96:17 PM7:00 AM7:00 AMMar 317:41 PMMar 317:41 PM7:16 AM7:16 AMMar 217:30 PMMar 217:30 PMMar 10DSTMar 10DSTSolarMidnightSolarMidnightSolarNoonSunriseSunset
The solar day over the course of March. 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. The transitions to and from daylight saving time are indicated by the 'DST' labels.

The figure below presents a compact representation of the sun's elevation (the angle of the sun above the horizon) and azimuth (its compass bearing) for every hour of every day in the reporting period. The horizontal axis is the day of the year and the vertical axis is the hour of the day. For a given day and hour of that day, the background color indicates the azimuth of the sun at that moment. The black isolines are contours of constant solar elevation.

Solar Elevation and Azimuth in March at Arcata-Eureka Airport

Solar Elevation and Azimuth in March at Arcata-Eureka AirportMar112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 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 AMFebApr001010202020303040500001010202030303040405060
northeastsouthwest
Solar elevation and azimuth over the course of March 2024. 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).

The figure below presents a compact representation of key lunar data for March 2024. The horizontal axis is the day, the vertical axis is the hour of the day, and the colored areas indicate when the moon is above the horizon. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases. The label associated with each bar indicates the date and time that the phase is obtained, and the companion time labels indicate the rise and set times of the Moon for the nearest time interval in which the moon is above the horizon.

Moon Rise, Set & Phases in March at Arcata-Eureka Airport

Moon Rise, Set & Phases in March at Arcata-Eureka AirportMar112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMFebAprFeb 93:00 PMFeb 93:00 PMFeb 244:31 AMFeb 244:31 AMMar 101:01 AMMar 101:01 AMMar 2512:01 AMMar 2512:01 AMApr 811:22 AMApr 811:22 AMApr 234:50 PMApr 234:50 PM7:33 AM7:33 AM5:36 PM5:36 PM5:22 PM5:22 PM7:22 AM7:22 AM7:56 AM7:56 AM8:06 PM8:06 PM7:16 PM7:16 PM7:25 AM7:25 AM6:44 AM6:44 AM8:12 PM8:12 PM8:12 PM8:12 PM6:33 AM6:33 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.
Mar 2024IlluminationMoonriseMoonsetMoonriseMeridian PassingDistance
1
71%-9:25 AMWSW-4:27 AMS246,662 mi
2
61%12:36 AMESE9:56 AMWSW-5:16 AMS243,775 mi
3
50%1:43 AMSE10:36 AMSW-6:10 AMS240,357 mi
4
40%2:50 AMSE11:27 AMSW-7:08 AMS236,553 mi
5
29%3:50 AMSE12:30 PMSW-8:10 AMS232,594 mi
6
19%4:43 AMSE1:43 PMSW-9:13 AMS228,794 mi
7
10%5:26 AMESE3:03 PMWSW-10:14 AMS225,519 mi
8
4%6:01 AMESE4:25 PMWSW-11:12 AMS223,125 mi
9
0%6:30 AMESE5:46 PMW-12:07 PMS221,893 mi
10
0%7:56 AME8:06 PMW-4:00 AMNE221,780 mi
11
4%8:21 AME9:24 PMW-2:50 PMS223,353 mi
12
10%8:47 AMENE10:42 PMWNW-3:40 PMS225,868 mi
13
18%9:14 AMENE--4:32 PMS229,229 mi
14
28%-12:00 AMWNW9:46 AMENE5:26 PMS233,088 mi
15
39%-1:15 AMWNW10:24 AMNE6:21 PMS237,090 mi
16
50%-2:26 AMNW11:09 AMNE7:18 PMS240,923 mi
17
60%-3:29 AMNW12:02 PMNE8:13 PMS244,350 mi
18
70%-4:21 AMNW1:02 PMNE9:06 PMS247,216 mi
19
78%-5:03 AMNW2:06 PMNE9:56 PMS249,447 mi
20
86%-5:37 AMWNW3:10 PMENE10:42 PMS251,033 mi
21
92%-6:04 AMWNW4:14 PMENE11:24 PMS252,008 mi
22
94%-6:28 AMWNW5:15 PMENE--
23
96%-6:48 AMWNW6:16 PME12:05 AMS252,431 mi
24
99%-7:07 AMW7:16 PME12:44 AMS252,364 mi
25
100%-7:25 AMW8:16 PME1:22 AMS251,862 mi
26
99%-7:44 AMWSW9:18 PMESE2:01 AMS250,961 mi
27
96%-8:05 AMWSW10:21 PMESE2:42 AMS249,675 mi
28
91%-8:29 AMWSW11:27 PMESE3:25 AMS248,001 mi
29
85%-8:58 AMWSW-4:12 AMS245,927 mi
30
76%12:34 AMSE9:34 AMSW-5:04 AMS243,447 mi
31
67%1:40 AMSE10:20 AMSW-6:00 AMS240,582 mi

We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night.

The chance that a given day will be muggy at Arcata-Eureka Airport is essentially constant during March, remaining around 0% throughout.

For reference, on May 12, the muggiest day of the year, there are muggy conditions 0% of the time, while on January 1, the least muggy day of the year, there are muggy conditions 0% of the time.

Humidity Comfort Levels in March at Arcata-Eureka Airport

Humidity Comfort Levels in March at Arcata-Eureka AirportMar11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%FebAprMar 10%Mar 10%Mar 310%Mar 310%Mar 110%Mar 110%Mar 210%Mar 210%drydry
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The percentage of time spent at various humidity comfort levels, categorized by dew point.

This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages.

The average hourly wind speed at Arcata-Eureka Airport is essentially constant during March, remaining within 0.2 miles per hour of 8.7 miles per hour throughout.

For reference, on December 12, the windiest day of the year, the daily average wind speed is 9.2 miles per hour, while on September 24, the calmest day of the year, the daily average wind speed is 6.9 miles per hour.

Average Wind Speed in March at Arcata-Eureka Airport

The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

The wind direction at Arcata-Eureka Airport during March is predominantly out of the south from March 1 to March 14 and the north from March 14 to March 31.

Wind Direction in March at Arcata-Eureka Airport

Wind Direction in March at Arcata-Eureka AirportSNMar11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%20%80%40%60%60%40%80%20%100%0%FebAprsouthnortheastwest
northeastsouthwest
The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions, excluding hours in which the mean wind speed is less than 1.0 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

Arcata-Eureka Airport is located near a large body of water (e.g., ocean, sea, or large lake). This section reports on the wide-area average surface temperature of that water.

The average surface water temperature at Arcata-Eureka Airport is essentially constant during March, remaining around 52°F throughout.

Average Water Temperature in March at Arcata-Eureka Airport

Average Water Temperature in March at Arcata-Eureka AirportMar112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313149°F49°F50°F50°F51°F51°F52°F52°F53°F53°F54°F54°F55°F55°FFebAprMar 151°FMar 151°FMar 3152°FMar 3152°FMar 1152°FMar 1152°FMar 2152°FMar 2152°F
The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands.

Definitions of the growing season vary throughout the world, but for the purposes of this report, we define it as the longest continuous period of non-freezing temperatures (≥ 32°F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere).

The growing season at Arcata-Eureka Airport typically lasts for 9.3 months (282 days), from around February 28 to around December 6, rarely starting after April 3, or ending before November 8.

The month of March at Arcata-Eureka Airport is more likely than not fully within the growing season, with the chance that a given day is in the growing season rapidly increasing from 52% to 87% over the course of the month.

Time Spent in Various Temperature Bands and the Growing Season in March at Arcata-Eureka Airport

Time Spent in Various Temperature Bands and the Growing Season in March at Arcata-Eureka Airportgrowing seasonMar11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%FebApr52%Mar 152%Mar 187%Mar 3187%Mar 3165%Mar 1165%Mar 1177%Mar 2177%Mar 21very 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 percentage of time spent in various temperature bands. The black line is the percentage chance that a given day is within the growing season.

Growing degree days are a measure of yearly heat accumulation used to predict plant and animal development, and defined as the integral of warmth above a base temperature, discarding any excess above a maximum temperature. In this report, we use a base of 50°F and a cap of 86°F.

The average accumulated growing degree days at Arcata-Eureka Airport are gradually increasing during March, increasing by 55°F, from 112°F to 167°F, over the course of the month.

Growing Degree Days in March at Arcata-Eureka Airport

The average growing degree days accumulated over the course of March, with 25th to 75th and 10th to 90th percentile bands.

This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Shortwave radiation includes visible light and ultraviolet radiation.

The average daily incident shortwave solar energy at Arcata-Eureka Airport is rapidly increasing during March, rising by 1.5 kWh, from 3.1 kWh to 4.7 kWh, over the course of the month.

Average Daily Incident Shortwave Solar Energy in March at Arcata-Eureka Airport

Average Daily Incident Shortwave Solar Energy in March at Arcata-Eureka AirportMar11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWhFebAprMar 13.1 kWhMar 13.1 kWhMar 314.7 kWhMar 314.7 kWhMar 113.6 kWhMar 113.6 kWhMar 214.1 kWhMar 214.1 kWh
The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.

This report illustrates the typical weather at Arcata-Eureka Airport, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.

Temperature and Dew Point

Arcata-Eureka Airport has a weather station that reported reliably enough during the analysis period that we have included it in our network. When available, historical temperature and dew point measurements are taken directly from this weather station. These records are obtained from NOAA's Integrated Surface Hourly data set, falling back on ICAO METAR records as required.

In the case of missing or erroneous measurements from this station, we fall back on records from nearby stations, adjusted according to typical seasonal and diurnal intra-station differences. For a given day of the year and hour of the day, the fallback station is selected to minimize the prediction error over the years for which there are measurements for both stations.

The stations on which we may fall back are Jack Mc Namara Field, Redding Municipal Airport, and Red Bluff Municipal Airport.

Other Data

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.

All other weather data, including cloud cover, precipitation, wind speed and direction, and solar flux, come from NASA's MERRA-2 Modern-Era Retrospective Analysis . This reanalysis combines a variety of wide-area measurements in a state-of-the-art global meteorological model to reconstruct the hourly history of weather throughout the world on a 50-kilometer grid.

Land Use data comes from the Global Land Cover SHARE database , published by the Food and Agriculture Organization of the United Nations.

Elevation data comes from the Shuttle Radar Topography Mission (SRTM) , published by NASA's Jet Propulsion Laboratory.

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.

We further caution that our travel scores are only as good as the data that underpin them, that weather conditions at any given location and time are unpredictable and variable, and that the definition of the scores reflects a particular set of preferences that may not agree with those of any particular reader.

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