Summer Weather in Halden Norway

Daily high temperatures are around 65°F, rarely falling below 54°F or exceeding 77°F. The highest daily average high temperature is 68°F on July 23.

Daily low temperatures are around 51°F, rarely falling below 41°F or exceeding 60°F. The highest daily average low temperature is 54°F on July 22.

For reference, on July 22, the hottest day of the year, temperatures in Halden typically range from 54°F to 68°F, while on February 8, the coldest day of the year, they range from 23°F to 32°F.

The figure below shows you a compact characterization of the hourly average summer temperatures. 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.

Haines, United States (4,068 miles away); Terrace, Canada (4,283 miles); and Shelburne, Canada (3,268 miles) are the far-away foreign places with temperatures most similar to Halden (view comparison).

© OpenStreetMap contributors

Compare Halden to another city:

CompareMap

The summer in Halden experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 47% throughout the season. The lowest chance of overcast or mostly cloudy conditions is 44% on July 15.

The clearest day of the summer is July 15, with clear, mostly clear, or partly cloudy conditions 56% of the time.

For reference, on January 26, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 71%, while on July 15, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 56%.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Halden, the chance of a wet day over the course of the summer is increasing, starting the season at 29% and ending it at 34%.

For reference, the year's highest daily chance of a wet day is 38% on October 18, and its lowest chance is 23% on April 23.

Rainfall

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

The average sliding 31-day rainfall during the summer in Halden is increasing, starting the season at 2.3 inches, when it rarely exceeds 4.2 inches or falls below 0.8 inches, and ending the season at 3.1 inches, when it rarely exceeds 5.4 inches or falls below 1.1 inches.

Over the course of the summer in Halden, the length of the day is very rapidly decreasing. From the start to the end of the season, the length of the day decreases by 3 hours, 56 minutes, implying an average daily decrease of 2 minutes, 35 seconds, and weekly decrease of 18 minutes, 8 seconds.

The shortest day of the summer is August 31, with 14 hours, 7 minutes of daylight and the longest day is June 20, with 18 hours, 33 minutes of daylight.

The earliest sunrise of the summer in Halden is 3:59 AM on June 18 and the latest sunrise is 2 hours, 11 minutes later at 6:10 AM on August 31.

The latest sunset is 10:32 PM on June 23 and the earliest sunset is 2 hours, 15 minutes earlier at 8:17 PM on August 31.

Daylight saving time is observed in Halden during 2024, but it neither starts nor ends during the summer, so the entire season is in standard time.

For reference, on June 20, the longest day of the year, the Sun rises at 3:59 AM and sets 18 hours, 33 minutes later, at 10:32 PM, while on December 21, the shortest day of the year, it rises at 9:08 AM and sets 6 hours, 8 minutes later, at 3:16 PM.

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.

The figure below presents a compact representation of key lunar data for the summer of 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.

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 Halden is essentially constant during the summer, remaining around 0% throughout.

For reference, on August 10, the muggiest day of the year, there are muggy conditions 0% of the time, while on September 15, the least muggy day of the year, there are muggy conditions 0% of the time.

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 Halden is essentially constant during the summer, remaining within 0.3 miles per hour of 6.0 miles per hour throughout.

For reference, on January 6, the windiest day of the year, the daily average wind speed is 7.3 miles per hour, while on July 29, the calmest day of the year, the daily average wind speed is 5.6 miles per hour.

The lowest daily average wind speed during the summer is 5.6 miles per hour on August 2.

The hourly average wind direction in Halden throughout the summer is predominantly from the south, with a peak proportion of 47% on July 21.

Halden 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 Halden is increasing during the summer, rising by 7°F, from 55°F to 62°F, over the course of the season.

The highest average surface water temperature during the summer is 64°F on August 6.

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 Halden typically lasts for 5.4 months (164 days), from around April 27 to around October 8, rarely starting before April 10 or after May 14, and rarely ending before September 18 or after October 31.

The summer in Halden is reliably fully 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 Halden are rapidly increasing during the summer, increasing by 887°F, from 145°F to 1,031°F, over the course of the season.

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 Halden is very rapidly decreasing during the summer, falling by 2.2 kWh, from 6.1 kWh to 3.9 kWh, over the course of the season.

The highest average daily incident shortwave solar energy during the summer is 6.2 kWh on June 20.

For the purposes of this report, the geographical coordinates of Halden are 59.125 deg latitude, 11.388 deg longitude, and 49 ft elevation.

The topography within 2 miles of Halden contains significant variations in elevation, with a maximum elevation change of 623 feet and an average elevation above sea level of 242 feet. Within 10 miles contains significant variations in elevation (863 feet). Within 50 miles also contains very significant variations in elevation (1,430 feet).

The area within 2 miles of Halden is covered by artificial surfaces (44%), trees (35%), water (11%), and cropland (10%), within 10 miles by trees (69%) and cropland (14%), and within 50 miles by trees (52%) and water (30%).