July Weather in Isojoki Finland

Daily high temperatures are around 68°F, rarely falling below 58°F or exceeding 78°F. The highest daily average high temperature is 69°F on July 22.

Daily low temperatures increase by 2°F, from 49°F to 51°F, rarely falling below 43°F or exceeding 58°F. The highest daily average low temperature is 52°F on July 25.

For reference, on July 21, the hottest day of the year, temperatures in Isojoki typically range from 52°F to 69°F, while on February 8, the coldest day of the year, they range from 15°F to 25°F.

The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on July. 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.

Girdwood, United States (3,926 miles away) and Breckenridge, United States (4,851 miles) are the far-away foreign places with temperatures most similar to Isojoki (view comparison).

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The month of July in Isojoki experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 47% throughout the month. The lowest chance of overcast or mostly cloudy conditions is 45% on July 17.

The clearest day of the month is July 17, with clear, mostly clear, or partly cloudy conditions 55% of the time.

For reference, on January 26, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 75%, while on July 17, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 55%.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Isojoki, the chance of a wet day over the course of July is gradually increasing, starting the month at 28% and ending it at 30%.

For reference, the year's highest daily chance of a wet day is 33% on October 18, and its lowest chance is 17% on March 10.

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 July in Isojoki is essentially constant, remaining about 2.4 inches throughout, and rarely exceeding 4.2 inches or falling below 0.8 inches.

Over the course of July in Isojoki, the length of the day is very rapidly decreasing. From the start to the end of the month, the length of the day decreases by 2 hours, 12 minutes, implying an average daily decrease of 4 minutes, 23 seconds, and weekly decrease of 30 minutes, 41 seconds.

The shortest day of the month is July 31, with 17 hours, 24 minutes of daylight and the longest day is July 1, with 19 hours, 36 minutes of daylight.

The earliest sunrise of the month in Isojoki is 3:47 AM on July 1 and the latest sunrise is 1 hour, 8 minutes later at 4:55 AM on July 31.

The latest sunset is 11:23 PM on July 1 and the earliest sunset is 1 hour, 4 minutes earlier at 10:19 PM on July 31.

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

For reference, on June 20, the longest day of the year, the Sun rises at 3:39 AM and sets 19 hours, 49 minutes later, at 11:28 PM, while on December 21, the shortest day of the year, it rises at 9:57 AM and sets 5 hours, 6 minutes later, at 3:03 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 July 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 Isojoki is essentially constant during July, remaining around 1% throughout.

The highest chance of a muggy day during July is 1% on July 29.

For reference, on July 29, the muggiest day of the year, there are muggy conditions 1% of the time, while on September 12, 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 Isojoki is essentially constant during July, remaining around 5.0 miles per hour throughout.

For reference, on January 1, the windiest day of the year, the daily average wind speed is 7.3 miles per hour, while on July 9, the calmest day of the year, the daily average wind speed is 5.0 miles per hour.

The lowest daily average wind speed during July is 5.0 miles per hour on July 9.

The hourly average wind direction in Isojoki throughout July is predominantly from the south, with a peak proportion of 38% on July 22.

Isojoki 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 Isojoki is increasing during July, rising by 6°F, from 55°F to 61°F, over the course of the month.

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 Isojoki typically lasts for 3.9 months (121 days), from around May 21 to around September 18, rarely starting before May 2 or after June 9, and rarely ending before August 30 or after October 8.

The month of July in Isojoki 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 Isojoki are increasing during July, increasing by 327°F, from 329°F to 656°F, over the course of the month.

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 Isojoki is gradually decreasing during July, falling by 0.9 kWh, from 6.0 kWh to 5.2 kWh, over the course of the month.

For the purposes of this report, the geographical coordinates of Isojoki are 62.113 deg latitude, 21.959 deg longitude, and 335 ft elevation.

The topography within 2 miles of Isojoki contains only modest variations in elevation, with a maximum elevation change of 125 feet and an average elevation above sea level of 341 feet. Within 10 miles contains only modest variations in elevation (633 feet). Within 50 miles also contains significant variations in elevation (755 feet).

The area within 2 miles of Isojoki is covered by trees (69%) and cropland (19%), within 10 miles by trees (79%) and cropland (10%), and within 50 miles by trees (55%) and water (27%).