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Roy weather

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Roy weather alerts and warnings

active National Weather Service watches, warnings and advisories

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Roy weather in numbers

from 30 years of measured normals

Roy swings 77°F across the year, from 93°F highs in July to 16°F lows in December, and March is usually the wettest month in a year that brings about 22 in of precipitation.

Warmest month
July
93°F average high
Coldest month
December
16°F average low
Wettest month
March
22 in a year
Below freezing
6 months
January, February, March, April, November and December
Comfortable
2 months
May and October
Residents
38,000
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The weather map: all three models at once

NWS, American, European side by side around Roy and nearby towns.Live rain radar →
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Roy hourly forecast: next 14 hours

consensus of the three models

Rain in the next 24 hours, model by model

each model's own hourly precipitation, side by side

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Roy 10-day forecast, out to 14 days

where the models agree, and where they split

Roy, Utah (UT) is at its warmest in Jul (average highs near 93°F) and coldest in Dec (lows around 16°F), with roughly 22 in of precipitation across the year. Below, compare what NWS, American, European forecast for Roy 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.

Roy climate by month

average daytime high and overnight low across a typical year
Jan
34°
18°
Feb
37°
17°
Mar
45°
23°
Apr
56°
29°
May
69°
39°
Jun
81°
51°
Jul
93°
59°
Aug
88°
57°
Sep
79°
48°
Oct
65°
36°
Nov
46°
23°
Dec
38°
16°

Which forecast is most accurate in Roy?

CheckWeather Score, graded against the weather that actually happened
ProviderCheckWeather-scoreTempWindRainRun by
European logo
European ★ Best
87
/100rank #1
88±1.2°F94±1.7 mph8290% hitECMWF - European Centre for Medium-Range Weather ForecastsReading, United Kingdom
American logo
American
77
/100rank #2
88±1.2°F85±4.7 mph5877% 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.

What do you think of the forecasts?

your vote counts

The accuracy above is the measured record. This is your opinion: which forecast service do you trust most in United States? Give each 1 to 5 stars.

NWSNational Blend (NBM)
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AmericanNOAA GFS
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EuropeanECMWF
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One vote per service. Anonymous: we store no personal data, only a one-way hash of your connection for a day to stop double votes.

Common questions

What's the weather in Roy today?
On this page we show what NWS, American, European each forecast for Roy 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 Roy today or tomorrow?
Check the hourly strip and 7-day forecast above. We compare rain from NWS, American, European for Roy 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 Roy?
Over the last 30 days, the European model has been the most accurate for Roy (CheckWeather Score 87/100), ahead of the American at 77. We grade every model against the recorded weather. See the US accuracy scoreboard for the full method.
What is the warmest month in Roy?
July is typically the warmest month in Roy, with average highs around 93°F.
How cold does Roy get?
The coldest month in Roy is December, when overnight lows average about 16°F.
How much rain does Roy get?
Roy sees roughly 22 in of precipitation a year, with March usually the wettest month.

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