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April Weather in Tromsø Norway

Daily high temperatures increase by 7°F, from 35°F to 42°F, rarely falling below 28°F or exceeding 50°F.

Daily low temperatures increase by 7°F, from 25°F to 32°F, rarely falling below 16°F or exceeding 39°F.

For reference, on July 23, the hottest day of the year, temperatures in Tromsø typically range from 48°F to 59°F, while on January 25, the coldest day of the year, they range from 21°F to 29°F.

Average High and Low Temperature in April in Tromsø

Average High and Low Temperature in April in TromsøApr11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303010°F10°F15°F15°F20°F20°F25°F25°F30°F30°F35°F35°F40°F40°F45°F45°F50°F50°F55°F55°F60°F60°FMarMayApr 135°FApr 135°F25°F25°FApr 3042°FApr 3042°F32°F32°FApr 1137°FApr 1137°F28°F28°FApr 2140°FApr 2140°F30°F30°FNowNow
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 April. 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 April in Tromsø

Average Hourly Temperature in April in TromsøApr11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 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 AMMarMayNowNowfreezingvery coldcold
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.

Kodiak Station, Alaska, United States (3,627 miles away) is the far-away foreign place with temperatures most similar to Tromsø (view comparison).

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The month of April in Tromsø experiences decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 73% to 64%.

The clearest day of the month is April 30, with clear, mostly clear, or partly cloudy conditions 36% of the time.

For reference, on December 12, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 80%, while on May 29, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 44%.

Cloud Cover Categories in April in Tromsø

Cloud Cover Categories in April in TromsøApr1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%MarMayApr 128%Apr 128%Apr 3036%Apr 3036%Apr 1129%Apr 1129%Apr 2133%Apr 2133%NowNowclearmostly 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. In Tromsø, the chance of a wet day over the course of April is essentially constant, remaining around 36% throughout.

For reference, the year's highest daily chance of a wet day is 49% on October 20, and its lowest chance is 32% on May 28.

Over the course of April in Tromsø, the chance of a day with only rain increases from 14% to 28%, the chance of a day with mixed snow and rain decreases from 9% to 5%, and the chance of a day with only snow decreases from 12% to 3%.

Probability of Precipitation in April in Tromsø

Probability of Precipitation in April in TromsøApr1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%0%5%5%10%10%15%15%20%20%25%25%30%30%35%35%40%40%MarMayApr 134%Apr 134%Apr 3036%Apr 3036%Apr 1136%Apr 1136%Apr 2135%Apr 2135%NowNowsnowmixedrain
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 April in Tromsø is gradually increasing, starting the month at 1.5 inches, when it rarely exceeds 3.3 inches or falls below 0.3 inches, and ending the month at 1.9 inches, when it rarely exceeds 3.6 inches or falls below 0.6 inches.

Average Monthly Rainfall in April in Tromsø

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.

Snowfall

As with rainfall, we consider the snowfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day snowfall during April in Tromsø is very rapidly decreasing, starting the month at 8.6 inches, when it rarely exceeds 17.1 inches or falls below 1.4 inches, and ending the month at 2.3 inches, when it rarely exceeds 6.2 inches.

Average Monthly Snowfall in April in Tromsø

The average snowfall (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 rainfall.

Due to its extreme latitude, Tromsø experiences polar day (also known as the midnight Sun) during the summer and polar night during the winter. These are periods of time in which the sun is continuously above or below the horizon for more than one day. The precise start and end dates of polar day and night vary from year to year and depend on the precise location and elevation of the observer, and the local topography.

Neither polar day nor polar night occur during the month of April.

Over the course of April in Tromsø, the length of the day is very rapidly increasing. From the start to the end of the month, the length of the day increases by 4 hours, 35 minutes, implying an average daily increase of 9 minutes, 28 seconds, and weekly increase of 1 hour, 6 minutes, 18 seconds.

The shortest day of the month is April 1, with 14 hours, 5 minutes of daylight and the longest day is April 30, with 18 hours, 40 minutes of daylight.

Hours of Daylight and Twilight in April in Tromsø

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 latest sunrise of the month in Tromsø is 5:46 AM on April 1 and the earliest sunrise is 2 hours, 23 minutes earlier at 3:23 AM on April 30.

The earliest sunset is 7:51 PM on April 1 and the latest sunset is 2 hours, 12 minutes later at 10:03 PM on April 30.

Daylight saving time is observed in Tromsø during 2024, but it neither starts nor ends during April, so the entire month is in standard time.

Sunrise & Sunset with Twilight and Daylight Saving Time in April in Tromsø

Sunrise & Sunset with Twilight and Daylight Saving Time in April in TromsøApr11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMMarMay3:23 AM3:23 AMApr 3010:03 PMApr 3010:03 PM5:46 AM5:46 AMApr 17:51 PMApr 17:51 PM4:59 AM4:59 AMApr 118:33 PMApr 118:33 PMSolarMidnightSolarMidnightSolarNoonNowNow
The solar day over the course of April. 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 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 April in Tromsø

Solar Elevation and Azimuth in April in TromsøApr11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 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 AMMarMay010102020300010203030NowNow
northeastsouthwest
Solar elevation and azimuth over the course of April 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 April 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 April in Tromsø

Moon Rise, Set & Phases in April in TromsøApr11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMMarMayMar 1010:01 AMMar 1010:01 AMMar 258:01 AMMar 258:01 AMApr 88:22 PMApr 88:22 PMApr 241:50 AMApr 241:50 AMMay 85:23 AMMay 85:23 AM7:06 AM7:06 AM5:33 PM5:33 PM5:02 PM5:02 PM5:41 AM5:41 AM5:36 AM5:36 AM8:12 PM8:12 PM9:14 PM9:14 PM1:52 AM1:52 AM12:00 AM12:00 AMNowNow
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 2024IlluminationMoonriseMoonsetMoonriseMeridian PassingDistance
1
61%6:03 AMS238,694 mi
2
50%7:05 AMS235,371 mi
3
38%8:08 AMS231,974 mi
4
27%9:09 AMS228,751 mi
5
17%7:20 AMSE12:53 PMSW-10:06 AMS225,995 mi
6
8%6:35 AMESE3:29 PMWSW-10:59 AMS224,007 mi
7
3%6:04 AME5:50 PMW-11:51 AMS223,043 mi
8
0%5:36 AME8:12 PMWNW-12:41 PMS223,261 mi
9
1%5:04 AMENE10:49 PMNW-1:32 PMS224,685 mi
10
4%4:20 AMNE--2:23 PMS227,193 mi
11
11%3:17 PMS230,535 mi
12
19%4:13 PMS234,381 mi
13
29%5:09 PMS238,376 mi
14
39%6:03 PMS242,187 mi
15
50%6:55 PMS245,550 mi
16
59%7:43 PMS248,279 mi
17
69%8:28 PMS250,276 mi
18
77%-6:33 AMNNW11:40 AMNE9:09 PMS251,513 mi
19
85%-5:53 AMNW1:46 PMENE9:49 PMS252,021 mi
20
91%-5:25 AMWNW3:37 PMENE10:27 PMS251,875 mi
21
96%-5:01 AMW5:24 PME11:05 PMS251,171 mi
22
99%-4:38 AMWSW7:13 PMESE11:45 PMS250,016 mi
23
100%-4:12 AMWSW9:14 PMSE--
24
100%-3:39 AMSW11:53 PMSSE12:27 AMS248,506 mi
25
99%-2:33 AMSSW-1:13 AMS246,725 mi
26
96%2:03 AMS244,733 mi
27
91%2:58 AMS242,568 mi
28
84%3:57 AMS240,255 mi
29
75%4:59 AMS237,821 mi
30
65%6:00 AMS235,308 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 in Tromsø is essentially constant during April, remaining around 0% throughout.

For reference, on July 5, 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 April in Tromsø

Humidity Comfort Levels in April in TromsøApr1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%MarMayApr 160%Apr 160%Apr 10%Apr 10%Apr 300%Apr 300%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 in Tromsø is decreasing during April, decreasing from 9.1 miles per hour to 7.9 miles per hour over the course of the month.

For reference, on January 30, the windiest day of the year, the daily average wind speed is 11.1 miles per hour, while on July 31, the calmest day of the year, the daily average wind speed is 5.1 miles per hour.

Average Wind Speed in April in Tromsø

Average Wind Speed in April in TromsøApr1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300 mph0 mph2 mph2 mph4 mph4 mph6 mph6 mph8 mph8 mph10 mph10 mph12 mph12 mph14 mph14 mph16 mph16 mphMarMayApr 19.1 mphApr 19.1 mphApr 307.9 mphApr 307.9 mphApr 118.7 mphApr 118.7 mphNowNow
The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

The hourly average wind direction in Tromsø throughout April is predominantly from the south, with a peak proportion of 39% on April 1.

Wind Direction in April in Tromsø

Wind Direction in April in TromsøSEApr1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%100%20%80%40%60%60%40%80%20%100%0%MarMayNowNowwestsoutheastnorth
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).

Tromsø 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 in Tromsø is essentially constant during April, remaining within 1°F of 39°F throughout.

Average Water Temperature in April in Tromsø

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 in Tromsø typically lasts for 4.3 months (132 days), from around May 15 to around September 24, rarely starting before April 29 or after June 1, and rarely ending before September 3 or after October 13.

The month of April in Tromsø is more likely than not fully outside of the growing season, with the chance that a given day is in the growing season increasing from 0% to 12% over the course of the month.

Time Spent in Various Temperature Bands and the Growing Season in April in Tromsø

Time Spent in Various Temperature Bands and the Growing Season in April in TromsøApr1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%MarMayApr 10%Apr 10%Apr 3012%Apr 3012%Apr 110%Apr 110%Apr 212%Apr 212%50%May 1550%May 15freezingvery coldcoldcoolfrigid
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 in Tromsø are essentially constant during April, remaining around 0°F throughout.

Growing Degree Days in April in Tromsø

Growing Degree Days in April in TromsøApr1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300.0°F0.0°F0.5°F0.5°F1.0°F1.0°F1.5°F1.5°F2.0°F2.0°F2.5°F2.5°F3.0°F3.0°FMarMayApr 10°FApr 10°FApr 301°FApr 301°FApr 110°FApr 110°FApr 210°FApr 210°F
The average growing degree days accumulated over the course of April, 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 in Tromsø is rapidly increasing during April, rising by 1.5 kWh, from 2.1 kWh to 3.6 kWh, over the course of the month.

Average Daily Incident Shortwave Solar Energy in April in Tromsø

Average Daily Incident Shortwave Solar Energy in April in TromsøApr1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWhMarMayApr 12.1 kWhApr 12.1 kWhApr 303.6 kWhApr 303.6 kWhApr 112.6 kWhApr 112.6 kWhNowNow
The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.

For the purposes of this report, the geographical coordinates of Tromsø are 69.649 deg latitude, 18.955 deg longitude, and 46 ft elevation.

The topography within 2 miles of Tromsø contains large variations in elevation, with a maximum elevation change of 1,982 feet and an average elevation above sea level of 209 feet. Within 10 miles contains large variations in elevation (4,003 feet). Within 50 miles also contains extreme variations in elevation (5,981 feet).

The area within 2 miles of Tromsø is covered by trees (36%), artificial surfaces (36%), and water (17%), within 10 miles by trees (22%) and sparse vegetation (22%), and within 50 miles by water (43%) and trees (19%).

This report illustrates the typical weather in Tromsø, 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

There are 4 weather stations near enough to contribute to our estimation of the temperature and dew point in Tromsø.

For each station, the records are corrected for the elevation difference between that station and Tromsø according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.

The estimated value at Tromsø is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Tromsø and a given station.

The stations contributing to this reconstruction are:

To get a sense of how much these sources agree with each other, you can view a comparison of Tromsø and the stations that contribute to our estimates of its temperature history and climate. Please note that each source's contribution is adjusted for elevation and the relative change present in the MERRA-2 data.

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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