NWS, American, European side by side around San Tan Valley and nearby towns.Live rain radar →
Loading the three model maps…
Next 14 hours
consensus of the three models
7-day forecast
where the models agree, and where they split
San Tan Valley, AZ is at its warmest in Jul (average highs near 109°F) and coldest in Jan (lows around 41°F), with roughly 11 in of precipitation across the year. Below, compare what NWS, American, European forecast for San Tan Valley right now, and see exactly where they disagree.
San Tan Valley climate by month
average daytime high and overnight low across a typical year
Jan
61°
41°
Feb
65°
44°
Mar
70°
47°
Apr
84°
55°
May
93°
66°
Jun
102°
75°
Jul
109°
85°
Aug
104°
82°
Sep
101°
76°
Oct
92°
65°
Nov
74°
50°
Dec
70°
45°
Common questions
What's the weather in San Tan Valley today?
On this page we show what NWS, American, European each forecast for San Tan Valley 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 San Tan Valley today or tomorrow?
Check the hourly strip and 7-day forecast above. We compare rain from NWS, American, European for San Tan Valley 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 San Tan Valley?
No single model is always right. NWS, American, European each run their own physics, so we line all three up: when they agree the San Tan Valley 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 San Tan Valley?
Jul is typically the warmest month in San Tan Valley, with average highs around 109°F.
How cold does San Tan Valley get?
The coldest month in San Tan Valley is Jan, when overnight lows average about 41°F.
How much rain does San Tan Valley get?
San Tan Valley sees roughly 11 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.