Skip to main content
Every US forecast, compared
checkweather.io
CheckWeather USAnnandale

Annandale weather

Loading live data…

The weather map: all three models at once

NWS, American, European side by side around Annandale and nearby towns.Live rain radar →
Loading the three model maps…

Next 14 hours

consensus of the three models

14-day forecast

where the models agree, and where they split

Annandale, VA is at its warmest in Jul (average highs near 88°F) and coldest in Jan (lows around 33°F), with roughly 47 in of precipitation across the year. Below, compare what NWS, American, European forecast for Annandale right now, and see exactly where they disagree.

We grade every model against the weather that actually happened, so you can see which forecast model is most accurate in United States before you trust any single number.

Annandale climate by month

average daytime high and overnight low across a typical year
Jan
47°
33°
Feb
52°
34°
Mar
57°
38°
Apr
69°
49°
May
74°
54°
Jun
84°
63°
Jul
88°
69°
Aug
85°
67°
Sep
78°
62°
Oct
69°
51°
Nov
57°
41°
Dec
48°
34°

Which forecast is most accurate in Annandale?

CheckWeather Score — graded against the weather that actually happened
ProviderCheckWeather Score🌡 Temp💨 Wind🌧 RainRun by
European logo
European ★ Best
87
/100rank #1
90±1.0°F97±0.9 mph7687% hitECMWF - European Centre for Medium-Range Weather ForecastsReading, United Kingdom
American logo
American
68
/100rank #2
86±1.4°F94±1.8 mph2961% hitNOAA / NCEP (United States)College Park, Maryland, USA

The CheckWeather Score blends temperature, wind and rain accuracy — each measured against ERA5 (the recorded weather) over the last 30 days across 1999 cities. Lower error means a higher score. See which forecast model is most accurate in United States, how we measure forecast accuracy, or which model each weather app uses.

Common questions

What's the weather in Annandale today?
On this page we show what NWS, American, European each forecast for Annandale today, side by side and updated live. When all three agree the forecast is reliable; when they split, we flag it so you know the day is genuinely less certain.
Will it rain in Annandale today or tomorrow?
Check the hourly strip and 7-day forecast above. We compare rain from NWS, American, European for Annandale and flag the days where the models disagree on whether showers actually arrive, which is exactly when a single app can catch you out.
Which forecast is most accurate for Annandale?
Over the last 30 days, the European model has been the most accurate for Annandale (CheckWeather Score 87/100), ahead of the American at 68. We grade every model against the recorded weather. See the US accuracy scoreboard for the full method.
What is the warmest month in Annandale?
July is typically the warmest month in Annandale, with average highs around 88°F.
How cold does Annandale get?
The coldest month in Annandale is January, when overnight lows average about 33°F.
How much rain does Annandale get?
Annandale sees roughly 47 in of precipitation a year, with July usually the wettest month.

Nearby

More US weather