Average Weather on May 28 in Oulu Finland
On May 28, the temperature in Oulu typically ranges from 45°F to 56°F and is rarely below 37°F or above 70°F.
For reference, on July 22, the hottest day of the year, temperatures in Oulu typically range from 54°F to 69°F, while on February 3, the coldest day of the year, they range from 7°F to 20°F.
The coolest time of the day is from 12:45 AM to 7:00 AM, with the coldest at 3:45 AM, at which time the temperature is below 49°F three days out of four, and below 54°F nine days out of ten.
The warmest time of the day is from 11:30 AM to 8:30 PM, with the hottest at 3:45 PM, at which time the temperature is above 50°F three days out of four, and above 45°F nine days out of ten.
The day has gained half its heat by 9:00 AM and lost it again by 10:45 PM.
Average Temperature on May 28
The figure below shows you a compact characterization of the range of temperatures experienced on May 28 throughout the historical record. The horizontal axis is the time of day and the colored stacked areas indicate the percentage of hours spent in various temperature bands.
Temperature Bands on May 28
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
Compared to May 28 (excluding 30 days before and after), September 7 has the most similar daily average high and low temperatures.
The average percentage of the sky covered by clouds in Oulu on May 28 varies over the course of the day.
The cloudiest time of day is around 5:30 AM, at which time the chance of overcast or mostly cloudy conditions is 56%.
The clearest time of day is around 10:30 PM, at which time the chance of clear, mostly clear, or partly cloudy conditions is 54%.
For reference, on January 28, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 82%, while on June 29, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 52%.
Cloud Cover Categories on May 28
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
On average, there is a 27% chance that more than 0.04 inches of total precipitation will fall in Oulu throughout the day on May 28, of which 99% is expected to be rain alone, 0% to be snow alone, and 1% to be a mixture of snow and rain.
For reference, the year's highest daily chance of precipitation is 33% on July 28, and its lowest chance is 17% on March 29.
For those 27% of years with precipitation on May 28, the chart below shows when throughout the day that precipitation is more or less likely to occur, excluding hourly accumulations of less than 0.01 inches. If precipitation were equally likely throughout the day, all hours would report 4.2% (100% divided by 24 hours).
Precipitation is most likely between 12 PM and 1 PM, and least likely between 11 PM and 12 AM.
Hourly Share of Precipitation on May 28
In Oulu on Thursday, May 28, 2020, the Sun rises at 3:07 AM and sets 20 hours, 18 minutes later, at 11:25 PM. Solar noon is at 1:15 PM.
For reference, on June 20, the longest day of the year, the Sun rises at 2:18 AM and sets 22 hours, 3 minutes later, at 12:21 AM, while on December 21, the shortest day of the year, it rises at 10:29 AM and sets 3 hours, 34 minutes later, at 2:03 PM.
Solar Elevation on May 28, 2020
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.
Muggy conditions are essentially unheard-of in Oulu on May 28.
Humidity Comfort Levels on May 28
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
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 Oulu on May 28 varies throughout the day, with a daily average of 5.9 miles per hour.
The windiest time of day is around 1:45 PM, with an average hourly wind speed of 6.9 miles per hour, mostly staying between 5.0 miles per hour and 8.7 miles per hour, and rarely falling below 3.3 miles per hour or exceeding 10.5 miles per hour.
The calmest time of day is around 8:30 PM, with an average hourly wind speed of 5.2 miles per hour, mostly staying between 3.4 miles per hour and 6.6 miles per hour, and rarely falling below 2.5 miles per hour or exceeding 8.2 miles per hour.
For reference, on January 25, the windiest day of the year, the daily average wind speed is 8.5 miles per hour, while on July 22, the calmest day of the year, the daily average wind speed is 5.3 miles per hour.
Wind Speed on May 28
Over the entire course of May 28 in Oulu, the hourly average wind direction, in order of prevalence, is from the west (32%), north (25%), south (22%), and east (20%).
Wind Direction on May 28
Oulu 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 does not change appreciably over the course of the day, so this section does not include a chart.
The average surface water temperature on May 28 in Oulu is 40°F, mostly staying between 38°F and 42°F, and rarely falling below 36°F or exceeding 44°F.
For reference, the year's highest average is 59°F on August 7, and its lowest average is 31°F on February 29.
Shortwave Solar Power
This section discusses the incident shortwave solar power 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 peak incident shortwave solar power per square meter is 0.52 kilowatts at around 1:15 PM.
In contrast, the corresponding value on June 22, the brightest day of the year, is 0.55 kilowatts at around 11:45 AM. The corresponding value on December 20, the darkest day of the year, is 0.01 kilowatts at around 11:30 AM.
Shortwave Solar Power on May 28
For the purposes of this report, the geographical coordinates of Oulu are 65.012 deg latitude, 25.468 deg longitude, and 23 ft elevation.
The topography within 2 miles of Oulu is essentially flat, with a maximum elevation change of 69 feet and an average elevation above sea level of 24 feet. Within 10 miles is essentially flat (200 feet). Within 50 miles contains only modest variations in elevation (623 feet).
The area within 2 miles of Oulu is covered by artificial surfaces (83%) and trees (11%), within 10 miles by trees (48%) and water (26%), and within 50 miles by trees (51%) and water (31%).
This report illustrates the typical weather in Oulu, 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 is only a single weather station, Oulu Airport, in our network suitable to be used as a proxy for the historical temperature and dew point records of Oulu.
At a distance of 11 kilometers from Oulu, closer than our threshold of 150 kilometers, this station is deemed sufficiently nearby to be relied upon as our primary source for temperature and dew point records.
The station records are corrected for the elevation difference between the station and Oulu according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.
Please note that the station records themselves may additionally have been back-filled using other nearby stations or the MERRA-2 reanalysis.
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 aiports and weather stations are provided by AskGeo.com .
Maps are © Esri, with data from National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, and iPC.
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.