As of 06:09 MDT

Weather in Roy, MT

47°

Roy, Wednesday, 7 October, 06:09

Overcast. Feels like 43°. High 70°, low 47°.

Pressure30.09 inHg

Wind7.3 mph W

Humidity40%

Visibility6.2 mi

Dew point26°

See detailed hourly forecast

Thu, 0875° / 44°

75 °

Roy, Thursday, 8 October

Mostly clear. High 75°, low 44°.

Pressure29.91 inHg

Wind11.1 mph W

Humidity22%

Visibility6.2 mi

Dew point30°

Fri, 0982° / 61°

82 °

Roy, Friday, 9 October

Partly cloudy. High 82°, low 61°.

Pressure29.44 inHg

Wind14.4 mph W

Humidity17%

Visibility6.2 mi

Dew point30°

Sat, 1062° / 38°

0.11

62 °

Roy, Saturday, 10 October

Light rain. High 62°, low 38°.

Pressure29.68 inHg

Wind10.6 mph N

Humidity52%

Visibility6.2 mi

Dew point38°

Sun, 1137° / 33°

0.1

37 °

Roy, Sunday, 11 October

Snow. High 37°, low 33°.

Pressure30.27 inHg

Wind10.5 mph N

Humidity81%

Visibility—

Dew point30°

Mon, 1242° / 33°

42 °

Roy, Monday, 12 October

Overcast. High 42°, low 33°.

Pressure30.36 inHg

Wind8.3 mph SE

Humidity68%

Visibility—

Dew point28°

Tue, 1368° / 36°

68 °

Roy, Tuesday, 13 October

Light rain. High 68°, low 36°.

Pressure29.62 inHg

Wind13.9 mph W

Humidity49%

Visibility—

Dew point39°

Wed, 1453° / 39°

0.01

53 °

Roy, Wednesday, 14 October

Light rain. High 53°, low 39°.

Pressure29.68 inHg

Wind30.6 mph NW

Humidity39%

Visibility—

Dew point25°

Thu, 1544° / 33°

44 °

Roy, Thursday, 15 October

Overcast. High 44°, low 33°.

Pressure30.27 inHg

Wind28.6 mph NW

Humidity43%

Visibility—

Dew point18°

Fri, 1651° / 32°

51 °

Roy, Friday, 16 October

Clear. High 51°, low 32°.

Pressure30.36 inHg

Wind8.5 mph SE

Humidity38%

Visibility—

Dew point19°

Sat, 1752° / 39°

52 °

Roy, Saturday, 17 October

Overcast. High 52°, low 39°.

Pressure30.30 inHg

Wind7.4 mph N

Humidity30%

Visibility—

Dew point19°

Sun, 1858° / 38°

58 °

Roy, Sunday, 18 October

Overcast. High 58°, low 38°.

Pressure30.06 inHg

Wind7.4 mph W

Humidity26%

Visibility—

Dew point17°

Mon, 1953° / 42°

53 °

Roy, Monday, 19 October

Clear. High 53°, low 42°.

Pressure30.24 inHg

Wind9.7 mph W

Humidity32%

Visibility—

Dew point20°

Tue, 2053° / 37°

53 °

Roy, Tuesday, 20 October

Clear. High 53°, low 37°.

Pressure30.42 inHg

Wind8.7 mph S

Humidity35%

Visibility—

Dew point21°

Wed, 2155° / 34°

55 °

Roy, Wednesday, 21 October

Clear. High 55°, low 34°.

Pressure30.36 inHg

Wind7.9 mph SE

Humidity31%

Visibility—

Dew point18°

Thu, 2254° / 39°

54 °

Roy, Thursday, 22 October

Overcast. High 54°, low 39°.

Pressure30.12 inHg

Wind12.7 mph NW

Humidity27%

Visibility—

Dew point17°

About the monthly outlook

How accurate is a 30-day forecast?

The first 16 days come from weather models — reliable for the first 3–5 days and progressively less so after that. Days 17 through 30 for Roy, MT are built from the climate normal, the 60-year average, so they show typical weather for those dates rather than a specific forecast.

What does "above normal" mean?

We compare the forecast against the climate normal for those exact calendar days, computed from 60 years of observations. The deviation shows how much the coming month differs from a typical one.

Where do the 66-year records come from?

They are real temperature extremes recorded in Roy, MT since 1960: the highest and lowest reading for each calendar date, with the year it happened.

How often is it updated?

The forecast portion refreshes every hour; the climate portion is based on long-term data and stays stable.