As of 11:34 MDT

Weather in Riverside, MT

73°

Riverside, Thursday, 8 October, 11:34

Clear. Feels like 71°. High 77°, low 45°.

Pressure29.97 inHg

Wind4.5 mph S

Humidity29%

Visibility6.2 mi

Dew point39°

See detailed hourly forecast

Monthly outlook for Riverside, MT: average high 56.1°, average low 39°. That is 1.9° below the climate normal for October. Precipitation is expected on 4 days (about 1.4 inches), against a normal of 3 days and 0.7 inches. The warmest day looks like 9 October (84°), the coolest 16 October (29°).

56.1°/39°

Average high / low

−1.9°

Below normal

4 / 3

Wet days / normal

1.4 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
8 October – 17 October	55.2°	59.8°	-2.5°
18 October – 27 October	57.6°	57.6°	+0°
28 October – 6 November	at normal	50.9°	—

October records over 66 years

90.3°1 October 2011All-time high

-15.5°30 October 1991All-time low

Climate normals and records are computed from the nearest reference point — Klein (2 mi).

Fri, 0984° / 54°

84 °

Riverside, Friday, 9 October

Overcast. High 84°, low 54°.

Pressure29.56 inHg

Wind11.6 mph SW

Humidity20%

Visibility6.2 mi

Dew point32°

Sat, 1062° / 40°

0.04

62 °

Riverside, Saturday, 10 October

Light rain. High 62°, low 40°.

Pressure29.68 inHg

Wind8.5 mph NE

Humidity51%

Visibility6.2 mi

Dew point40°

Sun, 1140° / 35°

0.59

40 °

Riverside, Sunday, 11 October

Snow. High 40°, low 35°.

Pressure30.12 inHg

Wind10.3 mph NE

Humidity91%

Visibility6.2 mi

Dew point34°

Mon, 1235° / 33°

0.61

35 °

Riverside, Monday, 12 October

Snow. High 35°, low 33°.

Pressure30.15 inHg

Wind12 mph NE

Humidity92%

Visibility—

Dew point32°

Tue, 1347° / 33°

47 °

Riverside, Tuesday, 13 October

Overcast. High 47°, low 33°.

Pressure30.15 inHg

Wind6.9 mph SW

Humidity75%

Visibility—

Dew point32°

Wed, 1458° / 40°

0.06

58 °

Riverside, Wednesday, 14 October

Light rain. High 58°, low 40°.

Pressure29.59 inHg

Wind24.4 mph N

Humidity50%

Visibility—

Dew point38°

Thu, 1545° / 34°

0.1

45 °

Riverside, Thursday, 15 October

Snow. High 45°, low 34°.

Pressure30.27 inHg

Wind30.2 mph N

Humidity64%

Visibility—

Dew point27°

Fri, 1647° / 29°

47 °

Riverside, Friday, 16 October

Clear. High 47°, low 29°.

Pressure30.56 inHg

Wind11.3 mph S

Humidity48%

Visibility—

Dew point22°

Sat, 1757° / 34°

57 °

Riverside, Saturday, 17 October

Partly cloudy. High 57°, low 34°.

Pressure30.15 inHg

Wind17.4 mph SW

Humidity41%

Visibility—

Dew point26°

Sun, 1862° / 41°

62 °

Riverside, Sunday, 18 October

Clear. High 62°, low 41°.

Pressure29.97 inHg

Wind6.6 mph SW

Humidity38%

Visibility—

Dew point27°

Mon, 1966° / 44°

66 °

Riverside, Monday, 19 October

Partly cloudy. High 66°, low 44°.

Pressure29.97 inHg

Wind23.8 mph W

Humidity28%

Visibility—

Dew point26°

Tue, 2063° / 46°

63 °

Riverside, Tuesday, 20 October

Overcast. High 63°, low 46°.

Pressure30.18 inHg

Wind5.6 mph SW

Humidity34%

Visibility—

Dew point29°

Wed, 2154° / 44°

54 °

Riverside, Wednesday, 21 October

Clear. High 54°, low 44°.

Pressure30.24 inHg

Wind26.7 mph NW

Humidity55%

Visibility—

Dew point33°

Thu, 2253° / 36°

53 °

Riverside, Thursday, 22 October

Overcast. High 53°, low 36°.

Pressure30.09 inHg

Wind17.2 mph S

Humidity32%

Visibility—

Dew point19°

Fri, 2347° / 35°

47 °

Riverside, Friday, 23 October

Overcast. High 47°, low 35°.

Pressure29.77 inHg

Wind26.1 mph N

Humidity54%

Visibility—

Dew point28°

From day 17 onward the outlook is built from 60-year climate statistics

Sat, 2457° / 35°

0.03

57 °

Riverside, Saturday, 24 October

Climate normal for this date — 60-year average.

Average high57°

Average low35°

Average precipitation0.03 in

Chance of precipitation18%

Record high76° (1992)

Record low7° (1975)

Sun, 2556° / 36°

0.03

56 °

Riverside, Sunday, 25 October

Climate normal for this date — 60-year average.

Average high56°

Average low36°

Average precipitation0.03 in

Chance of precipitation20%

Record high75° (2017)

Record low-4° (2020)

Mon, 2655° / 36°

0.04

55 °

Riverside, Monday, 26 October

Climate normal for this date — 60-year average.

Average high55°

Average low36°

Average precipitation0.04 in

Chance of precipitation17%

Record high73° (1960)

Record low-1° (2020)

Tue, 2754° / 33°

0.03

54 °

Riverside, Tuesday, 27 October

Climate normal for this date — 60-year average.

Average high54°

Average low33°

Average precipitation0.03 in

Chance of precipitation15%

Record high71° (2024)

Record low1° (2023)

Wed, 2853° / 33°

0.04

53 °

Riverside, Wednesday, 28 October

Climate normal for this date — 60-year average.

Average high53°

Average low33°

Average precipitation0.04 in

Chance of precipitation22%

Record high74° (1990)

Record low2° (2023)

Thu, 2951° / 33°

0.03

51 °

Riverside, Thursday, 29 October

Climate normal for this date — 60-year average.

Average high51°

Average low33°

Average precipitation0.03 in

Chance of precipitation23%

Record high73° (1987)

Record low-4° (1991)

Fri, 3051° / 31°

0.02

51 °

Riverside, Friday, 30 October

Climate normal for this date — 60-year average.

Average high51°

Average low31°

Average precipitation0.02 in

Chance of precipitation15%

Record high71° (1990)

Record low-16° (1991)

Sat, 3151° / 32°

0.05

51 °

Riverside, Saturday, 31 October

Climate normal for this date — 60-year average.

Average high51°

Average low32°

Average precipitation0.05 in

Chance of precipitation15%

Record high73° (1990)

Record low8° (1984)

Sun, 0151° / 32°

0.02

51 °

Riverside, Sunday, 1 November

Climate normal for this date — 60-year average.

Average high51°

Average low32°

Average precipitation0.02 in

Chance of precipitation13%

Record high70° (1981)

Record low-1° (1991)

Mon, 0250° / 31°

0.01

50 °

Riverside, Monday, 2 November

Climate normal for this date — 60-year average.

Average high50°

Average low31°

Average precipitation0.01 in

Chance of precipitation8%

Record high69° (1965)

Record low-16° (1991)

Tue, 0351° / 31°

0.03

51 °

Riverside, Tuesday, 3 November

Climate normal for this date — 60-year average.

Average high51°

Average low31°

Average precipitation0.03 in

Chance of precipitation17%

Record high69° (1962)

Record low-12° (1991)

Wed, 0451° / 32°

0.03

51 °

Riverside, Wednesday, 4 November

Climate normal for this date — 60-year average.

Average high51°

Average low32°

Average precipitation0.03 in

Chance of precipitation17%

Record high71° (1976)

Record low6° (2003)

Thu, 0550° / 32°

0.05

50 °

Riverside, Thursday, 5 November

Climate normal for this date — 60-year average.

Average high50°

Average low32°

Average precipitation0.05 in

Chance of precipitation25%

Record high69° (2010)

Record low0° (2003)

Fri, 0649° / 30°

0.03

49 °

Riverside, Friday, 6 November

Climate normal for this date — 60-year average.

Average high49°

Average low30°

Average precipitation0.03 in

Chance of precipitation20%

Record high70° (2010)

Record low3° (2003)

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 Riverside, 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 Riverside, 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.