As of 06:06 MDT

Weather in Chester, MT

55°

Chester, Friday, 9 October, 06:06

Overcast. Feels like 53°. High 79°, low 50°.

Pressure29.65 inHg

Wind6.9 mph SW

Humidity46%

Visibility6.2 mi

Dew point34°

See detailed hourly forecast

Monthly outlook for Chester, MT: average high 50.5°, average low 38.1°. That is 3° below the climate normal for October. Precipitation is expected on 3 days (about 0.6 inches), against a normal of 2 days and 0.4 inches. The warmest day looks like 9 October (78.9°), the coolest 13 October (27.5°).

50.5°/38.1°

Average high / low

−3°

Below normal

3 / 2

Wet days / normal

0.6 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
9 October – 18 October	49.5°	56.5°	-3.9°
19 October – 28 October	52.2°	53.3°	-0.6°
29 October – 7 November	at normal	46.5°	—

October records over 66 years

86°7 October 1980All-time high

-13.9°30 October 1991All-time low

Sat, 1051° / 37°

0.01

51 °

Chester, Saturday, 10 October

Light rain. High 51°, low 37°.

Pressure29.80 inHg

Wind7.3 mph N

Humidity53%

Visibility6.2 mi

Dew point29°

Sun, 1136° / 31°

0.36

36 °

Chester, Sunday, 11 October

Snow. High 36°, low 31°.

Pressure30.18 inHg

Wind15.3 mph NE

Humidity91%

Visibility2.5 mi

Dew point30°

Mon, 1234° / 31°

0.19

34 °

Chester, Monday, 12 October

Snow. High 34°, low 31°.

Pressure30.18 inHg

Wind5.4 mph NE

Humidity94%

Visibility6.2 mi

Dew point31°

Tue, 1339° / 27°

39 °

Chester, Tuesday, 13 October

Overcast. High 39°, low 27°.

Pressure30.12 inHg

Wind6.7 mph SW

Humidity97%

Visibility—

Dew point30°

Wed, 1450° / 29°

50 °

Chester, Wednesday, 14 October

Light rain. High 50°, low 29°.

Pressure29.85 inHg

Wind18.4 mph NW

Humidity53%

Visibility—

Dew point31°

Thu, 1543° / 36°

43 °

Chester, Thursday, 15 October

Light rain. High 43°, low 36°.

Pressure30.47 inHg

Wind23.3 mph NW

Humidity44%

Visibility—

Dew point20°

Fri, 1651° / 31°

51 °

Chester, Friday, 16 October

Clear. High 51°, low 31°.

Pressure30.39 inHg

Wind14.4 mph S

Humidity36%

Visibility—

Dew point17°

Sat, 1758° / 45°

58 °

Chester, Saturday, 17 October

Partly cloudy. High 58°, low 45°.

Pressure30.09 inHg

Wind14.2 mph W

Humidity30%

Visibility—

Dew point23°

Sun, 1854° / 45°

54 °

Chester, Sunday, 18 October

Overcast. High 54°, low 45°.

Pressure30.09 inHg

Wind10.8 mph W

Humidity41%

Visibility—

Dew point27°

Mon, 1961° / 42°

61 °

Chester, Monday, 19 October

Overcast. High 61°, low 42°.

Pressure29.91 inHg

Wind9.3 mph SW

Humidity44%

Visibility—

Dew point29°

Tue, 2051° / 43°

0.08

51 °

Chester, Tuesday, 20 October

Light rain. High 51°, low 43°.

Pressure30.00 inHg

Wind8.8 mph W

Humidity63%

Visibility—

Dew point35°

Wed, 2149° / 38°

49 °

Chester, Wednesday, 21 October

Partly cloudy. High 49°, low 38°.

Pressure30.30 inHg

Wind6 mph NW

Humidity57%

Visibility—

Dew point30°

Thu, 2251° / 38°

51 °

Chester, Thursday, 22 October

Mostly clear. High 51°, low 38°.

Pressure30.18 inHg

Wind16.1 mph SE

Humidity69%

Visibility—

Dew point38°

Fri, 2348° / 45°

48 °

Chester, Friday, 23 October

Overcast. High 48°, low 45°.

Pressure30.03 inHg

Wind13 mph SE

Humidity74%

Visibility—

Dew point38°

Sat, 2453° / 40°

53 °

Chester, Saturday, 24 October

Overcast. High 53°, low 40°.

Pressure29.97 inHg

Wind8.9 mph NW

Humidity68%

Visibility—

Dew point38°

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

Sun, 2553° / 35°

0.01

53 °

Chester, Sunday, 25 October

Climate normal for this date — 60-year average.

Average high53°

Average low35°

Average precipitation0.01 in

Chance of precipitation8%

Record high74° (1990)

Record low-6° (2020)

Mon, 2651° / 33°

0.03

51 °

Chester, Monday, 26 October

Climate normal for this date — 60-year average.

Average high51°

Average low33°

Average precipitation0.03 in

Chance of precipitation20%

Record high71° (1983)

Record low-1° (2020)

Tue, 2751° / 32°

0.03

51 °

Chester, Tuesday, 27 October

Climate normal for this date — 60-year average.

Average high51°

Average low32°

Average precipitation0.03 in

Chance of precipitation15%

Record high69° (2001)

Record low6° (2023)

Wed, 2849° / 31°

0.02

49 °

Chester, Wednesday, 28 October

Climate normal for this date — 60-year average.

Average high49°

Average low31°

Average precipitation0.02 in

Chance of precipitation13%

Record high69° (1987)

Record low-3° (1991)

Thu, 2948° / 31°

0.02

48 °

Chester, Thursday, 29 October

Climate normal for this date — 60-year average.

Average high48°

Average low31°

Average precipitation0.02 in

Chance of precipitation13%

Record high72° (2008)

Record low-11° (1991)

Fri, 3048° / 30°

0.01

48 °

Chester, Friday, 30 October

Climate normal for this date — 60-year average.

Average high48°

Average low30°

Average precipitation0.01 in

Chance of precipitation7%

Record high68° (1983)

Record low-14° (1991)

Sat, 3147° / 30°

0.04

47 °

Chester, Saturday, 31 October

Climate normal for this date — 60-year average.

Average high47°

Average low30°

Average precipitation0.04 in

Chance of precipitation23%

Record high64° (1983)

Record low-5° (1984)

Sun, 0147° / 30°

0.01

47 °

Chester, Sunday, 1 November

Climate normal for this date — 60-year average.

Average high47°

Average low30°

Average precipitation0.01 in

Chance of precipitation7%

Record high69° (2025)

Record low-9° (1984)

Mon, 0247° / 30°

0.02

47 °

Chester, Monday, 2 November

Climate normal for this date — 60-year average.

Average high47°

Average low30°

Average precipitation0.02 in

Chance of precipitation17%

Record high65° (1981)

Record low-18° (1991)

Tue, 0348° / 30°

0.02

48 °

Chester, Tuesday, 3 November

Climate normal for this date — 60-year average.

Average high48°

Average low30°

Average precipitation0.02 in

Chance of precipitation12%

Record high67° (1981)

Record low-2° (1991)

Wed, 0447° / 31°

0.03

47 °

Chester, Wednesday, 4 November

Climate normal for this date — 60-year average.

Average high47°

Average low31°

Average precipitation0.03 in

Chance of precipitation17%

Record high67° (2001)

Record low5° (2003)

Thu, 0546° / 29°

0.03

46 °

Chester, Thursday, 5 November

Climate normal for this date — 60-year average.

Average high46°

Average low29°

Average precipitation0.03 in

Chance of precipitation22%

Record high68° (2010)

Record low-8° (2003)

Fri, 0644° / 28°

0.02

44 °

Chester, Friday, 6 November

Climate normal for this date — 60-year average.

Average high44°

Average low28°

Average precipitation0.02 in

Chance of precipitation15%

Record high67° (2010)

Record low2° (2003)

Sat, 0744° / 28°

0.02

44 °

Chester, Saturday, 7 November

Climate normal for this date — 60-year average.

Average high44°

Average low28°

Average precipitation0.02 in

Chance of precipitation22%

Record high70° (2010)

Record low-6° (1973)

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 Chester, 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 Chester, 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.