Weather forecast for tomorrow
Fairfax, VA

Weather forecast for tomorrow

Wednesday, Jun 18.

PM Thunderstorms
5:42 am

8:38 pm
EDT
PM Thunderstorms
90°F / 72°F
  • Wind: 10mph SW
  • Humidity: 73%
  • Precip. probability: 47%
  • Precipitation: 0.2"
  • UV index: 9
On Wednesday, June 18, expect stormy weather in the afternoon with lightning and gusts.
The likelihood of rainfall for tomorrow is low, and light precipitation is anticipated. The maximum forecasted temperature is a tropical 89.6°F, while the minimum temperature will be an agreeable 71.6°F.
The maximum heat index, which indicates how humid air affects the felt temperature, is computed to be a torridly hot 107.6°F. Take into consideration that the heat index values are calculated for shade and light wind conditions. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees.
It will feel hotter, with a temperature more typical of July's average maximum of 88°F.
Sunrise will be at 5:42 am and sunset at 8:38 pm; tomorrow's daylight will last for 14h and 56min.

Frequently asked questions

What is the weather forecast for Fairfax for tomorrow?
On Wednesday, in Fairfax, thunder and lightning are forecasted to move in during the afternoon.
Will it rain tomorrow?
Light precipitation of 0.2" is predicted. The chance of rainfall is 47%.
What will be the maximum temperature tomorrow?
Tomorrow, the highest temperature will be 89.6°F, while the lowest temperature will be 71.6°F. The maximum heat index, which reflects the perceived temperature due to humidity levels, is estimated at 107.6°F.
The maximum temperature will be a few degrees higher than the average highest temperature of 82.9°F in June. The lowest temperature will be also relatively higher than the average low of 63.5°F.
What time are sunrise and sunset tomorrow?
On Wednesday, in Fairfax, sunrise will be at 5:42 am and sunset at 8:38 pm (EDT).
How many hours of daylight will Fairfax have tomorrow?
In Fairfax, the length of the day tomorrow will be 14h and 56min.

Hourly weather forecast

12 am
  • 72°F
  • Feels like:
    75°F
Partly Cloudy
Partly Cloudy
  • Wind: 4mph S
  • Pressure: 29.91"Hg
  • Humidity: 99%
  • Precip. probability: 21%
  • Precipitation: 0"
  • Visibility: 5mi
2 am
  • 72°F
  • Feels like:
    75°F
Mostly Cloudy
Mostly Cloudy
  • Wind: 3mph SSW
  • Pressure: 29.91"Hg
  • Humidity: 100%
  • Precip. probability: 20%
  • Precipitation: 0"
  • Visibility: 4mi
4 am
  • 72°F
  • Feels like:
    73°F
Mostly Cloudy
Mostly Cloudy
  • Wind: 2mph S
  • Pressure: 29.91"Hg
  • Humidity: 100%
  • Precip. probability: 21%
  • Precipitation: 0"
  • Visibility: 4mi
Sunrise: 5:42 am
6 am
  • 72°F
  • Feels like:
    73°F
Mostly Cloudy
Mostly Cloudy
  • Wind: 2mph S
  • Pressure: 29.91"Hg
  • Humidity: 100%
  • Precip. probability: 11%
  • Precipitation: 0"
  • Visibility: 2mi
8 am
  • 75°F
  • Feels like:
    79°F
Mostly Cloudy
Mostly Cloudy
  • Wind: 4mph SSW
  • Pressure: 29.91"Hg
  • Humidity: 94%
  • Precip. probability: 11%
  • Precipitation: 0"
  • Visibility: 5mi
10 am
  • 81°F
  • Feels like:
    86°F
Partly Cloudy
Partly Cloudy
  • Wind: 6mph SW
  • Pressure: 29.91"Hg
  • Humidity: 79%
  • Precip. probability: 12%
  • Precipitation: 0"
  • Visibility: 10mi
12 pm
  • 84°F
  • Feels like:
    91°F
Partly Cloudy
Partly Cloudy
  • Wind: 7mph SW
  • Pressure: 29.91"Hg
  • Humidity: 65%
  • Precip. probability: 12%
  • Precipitation: 0"
  • Visibility: 10mi
2 pm
  • 88°F
  • Feels like:
    95°F
Showers
Showers
  • Wind: 9mph SW
  • Pressure: 29.88"Hg
  • Humidity: 59%
  • Precip. probability: 41%
  • Precipitation: 0.04"
  • Visibility: 7mi
4 pm
  • 84°F
  • Feels like:
    91°F
Mostly Cloudy
Mostly Cloudy
  • Wind: 7mph W
  • Pressure: 29.88"Hg
  • Humidity: 65%
  • Precip. probability: 24%
  • Precipitation: 0"
  • Visibility: 10mi
6 pm
  • 86°F
  • Feels like:
    93°F
Showers
Showers
  • Wind: 7mph WSW
  • Pressure: 29.85"Hg
  • Humidity: 67%
  • Precip. probability: 35%
  • Precipitation: 0.04"
  • Visibility: 7mi
8 pm
  • 82°F
  • Feels like:
    88°F
Partly Cloudy
Partly Cloudy
  • Wind: 4mph SW
  • Pressure: 29.85"Hg
  • Humidity: 73%
  • Precip. probability: 9%
  • Precipitation: 0"
  • Visibility: 10mi
Sunset: 8:38 pm
10 pm
  • 79°F
  • Feels like:
    84°F
Partly Cloudy
Partly Cloudy
  • Wind: 4mph SSW
  • Pressure: 29.88"Hg
  • Humidity: 83%
  • Precip. probability: 6%
  • Precipitation: 0"
  • Visibility: 10mi
Tomorrow, on Wednesday, a combination of primarily cloudy and occasionally rainy and thunderstorm-prone weather is expected.
Rainfall is forecasted at 3 am, 2 pm, 3 pm, 5 pm and 6 pm. With moderate precipitation of 0.16", most rainfall is expected at 3 pm.
The temperature will be between a minimum of 71.6°F and a maximum of 87.8°F. The feels-like temperature will be between the lowest temperature of 73.4°F and the highest temperature of 95°F. The hottest part of the day will be at 2 pm and 3 pm.
The maximum is expected to resemble July's average high of 88°F rather than June's. The expected low will be also more close to what’s common in July than the current June average of 63.5°F.
Updated: Jun 17, 2025 @ 14:31:45 UTC
Published by: Weather U.S. | About Us
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