CheckWeather US›Alpharetta
Alpharetta weather
Loading live data…The weather map: all three models at once
NWS, American, European side by side around Alpharetta and nearby towns.Live rain radar →Loading the three model maps…
Next 14 hours
consensus of the three models7-day forecast
where the models agree, and where they splitAlpharetta, GA is at its warmest in Jul (average highs near 89°F) and coldest in Jan (lows around 36°F), with roughly 56 in of precipitation across the year. Below, compare what NWS, American, European forecast for Alpharetta right now, and see exactly where they disagree.
Alpharetta climate by month
average daytime high and overnight low across a typical yearJan
53°
36°
Feb
61°
42°
Mar
64°
44°
Apr
71°
51°
May
78°
59°
Jun
86°
65°
Jul
89°
70°
Aug
89°
69°
Sep
82°
64°
Oct
74°
53°
Nov
63°
47°
Dec
54°
38°
Which forecast is most accurate in the US?
CheckWeather Score — graded against the weather that actually happened
The CheckWeather Score blends temperature, wind and rain accuracy — each measured against ERA5 (the recorded weather) over the last 30 days across 40 cities. Lower error means a higher score. The apps you know (AccuWeather, Apple Weather, The Weather Channel) are built on these models.
Common questions
What's the weather in Alpharetta today?
On this page we show what NWS, American, European each forecast for Alpharetta 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 Alpharetta today or tomorrow?
Check the hourly strip and 7-day forecast above. We compare rain from NWS, American, European for Alpharetta 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 Alpharetta?
No single model is always right. NWS, American, European each run their own physics, so we line all three up: when they agree the Alpharetta forecast is reliable, and when they split you should expect surprises. See our tested US accuracy scoreboard for how the models compare.
What is the warmest month in Alpharetta?
Jul is typically the warmest month in Alpharetta, with average highs around 89°F.
How cold does Alpharetta get?
The coldest month in Alpharetta is Jan, when overnight lows average about 36°F.
How much rain does Alpharetta get?
Alpharetta sees roughly 56 in of precipitation a year, with Jan usually the wettest month.
The forecasts Americans check
The two biggest apps keep their model a secret, so we can't show their numbers, only link you to them. The National Weather Service is public, so its data sits right in the comparison above.