As of 10:42 MDT

Weather in Roy Summit, ID

40°

Roy Summit, Tuesday, 13 October, 10:42

Overcast. Feels like 35°. High 42°, low 38°.

Pressure30.09 inHg

Wind7.2 mph NW

Humidity93%

Visibility5.3 mi

Dew point38°

See detailed hourly forecast

Wed, 1448° / 33°

48 °

Roy Summit, Wednesday, 14 October

Clear. High 48°, low 33°.

Pressure30.24 inHg

Wind7.3 mph NW

Humidity66%

Visibility6.2 mi

Dew point29°

Thu, 1561° / 38°

61 °

Roy Summit, Thursday, 15 October

Clear. High 61°, low 38°.

Pressure30.50 inHg

Wind3.2 mph N

Humidity52%

Visibility6.2 mi

Dew point36°

Fri, 1662° / 39°

62 °

Roy Summit, Friday, 16 October

Clear. High 62°, low 39°.

Pressure30.50 inHg

Wind7.9 mph SE

Humidity44%

Visibility6.2 mi

Dew point34°

Sat, 1761° / 41°

61 °

Roy Summit, Saturday, 17 October

Clear. High 61°, low 41°.

Pressure30.27 inHg

Wind11 mph S

Humidity52%

Visibility—

Dew point38°

Sun, 1862° / 41°

62 °

Roy Summit, Sunday, 18 October

Clear. High 62°, low 41°.

Pressure30.09 inHg

Wind8.5 mph S

Humidity58%

Visibility—

Dew point41°

Mon, 1960° / 46°

60 °

Roy Summit, Monday, 19 October

Overcast. High 60°, low 46°.

Pressure29.83 inHg

Wind18.8 mph S

Humidity40%

Visibility—

Dew point32°

Tue, 2041° / 38°

0.31

41 °

Roy Summit, Tuesday, 20 October

Light rain. High 41°, low 38°.

Pressure29.83 inHg

Wind9 mph NW

Humidity84%

Visibility—

Dew point36°

Wed, 2139° / 36°

0.03

39 °

Roy Summit, Wednesday, 21 October

Light rain. High 39°, low 36°.

Pressure29.97 inHg

Wind14.7 mph NW

Humidity94%

Visibility—

Dew point35°

Thu, 2244° / 32°

0.01

44 °

Roy Summit, Thursday, 22 October

Light rain. High 44°, low 32°.

Pressure30.03 inHg

Wind13 mph W

Humidity45%

Visibility—

Dew point21°

Fri, 2341° / 31°

0.13

41 °

Roy Summit, Friday, 23 October

Snow. High 41°, low 31°.

Pressure30.36 inHg

Wind22.7 mph NW

Humidity73%

Visibility—

Dew point28°

Sat, 2447° / 31°

47 °

Roy Summit, Saturday, 24 October

Clear. High 47°, low 31°.

Pressure30.53 inHg

Wind6.3 mph N

Humidity48%

Visibility—

Dew point22°

Sun, 2554° / 35°

54 °

Roy Summit, Sunday, 25 October

Clear. High 54°, low 35°.

Pressure30.36 inHg

Wind6.9 mph N

Humidity35%

Visibility—

Dew point21°

Mon, 2656° / 38°

56 °

Roy Summit, Monday, 26 October

Clear. High 56°, low 38°.

Pressure30.03 inHg

Wind7.8 mph S

Humidity39%

Visibility—

Dew point26°

Tue, 2757° / 39°

57 °

Roy Summit, Tuesday, 27 October

Partly cloudy. High 57°, low 39°.

Pressure29.97 inHg

Wind14.8 mph SW

Humidity51%

Visibility—

Dew point31°

Wed, 2850° / 38°

50 °

Roy Summit, Wednesday, 28 October

Overcast. High 50°, low 38°.

Pressure30.15 inHg

Wind9.6 mph NW

Humidity47%

Visibility—

Dew point26°

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 Summit, ID 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 Summit, ID 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.