As of 18:22 CDT

Weather in Sumter, MN

61°Current weather

Sumter, Thursday, 8 October, 18:22

Overcast. Feels like 59°. High 65°, low 44°.

Pressure30.03 inHg
Wind0 mph N
Humidity48%
Visibility6.2 mi
Dew point42°

Monthly outlook for Sumter, MN: average high 66.5°, average low 47.8°. That is 5.1° above the climate normal for October. Precipitation is expected on 2 days (about 0.2 inches), against a normal of 4 days and 1.3 inches. The warmest day looks like 10 October (82.4°), the coolest 17 October (32.8°).

66.5°/47.8°
Average high / low
+5.1°
Above normal
2 / 4
Wet days / normal
0.2 in
Precipitation this month

Ten-day blocks vs climate normal

PeriodForecast highNormalDifference
8 October – 17 October66.7°58.7°+4.5°
18 October – 27 October66.1°54.5°+6.4°
28 October – 6 Novemberat normal49.2°—

October records over 66 years

90.1°3 October 2025All-time high
6.8°27 October 2020All-time low

Climate normals and records are computed from the nearest reference point — Biscay (6 mi).

Fri, 0973° / 46°0Mostly clear
73 °Mostly clear

Sumter, Friday, 9 October

Mostly clear. High 73°, low 46°.

Pressure30.00 inHg
Wind10.4 mph SE
Humidity50%
Visibility6.2 mi
Dew point47°
Sat, 1082° / 55°0Clear
82 °Clear

Sumter, Saturday, 10 October

Clear. High 82°, low 55°.

Pressure29.74 inHg
Wind17.8 mph S
Humidity50%
Visibility6.2 mi
Dew point57°
Sun, 1182° / 64°0Overcast
82 °Overcast

Sumter, Sunday, 11 October

Overcast. High 82°, low 64°.

Pressure29.80 inHg
Wind10.6 mph S
Humidity53%
Visibility6.2 mi
Dew point59°
Mon, 1268° / 54°0.03Light rain
68 °Light rain

Sumter, Monday, 12 October

Light rain. High 68°, low 54°.

Pressure29.88 inHg
Wind10.3 mph N
Humidity63%
Visibility6.2 mi
Dew point48°
Tue, 1359° / 51°0.08Light rain
59 °Light rain

Sumter, Tuesday, 13 October

Light rain. High 59°, low 51°.

Pressure30.09 inHg
Wind7.6 mph NE
Humidity56%
Visibility—
Dew point42°
Wed, 1466° / 47°0.11Light rain
66 °Light rain

Sumter, Wednesday, 14 October

Light rain. High 66°, low 47°.

Pressure29.77 inHg
Wind22.6 mph SE
Humidity75%
Visibility—
Dew point51°
Thu, 1569° / 53°0Clear
69 °Clear

Sumter, Thursday, 15 October

Clear. High 69°, low 53°.

Pressure29.91 inHg
Wind20.3 mph SW
Humidity39%
Visibility—
Dew point39°
Fri, 1651° / 42°0Overcast
51 °Overcast

Sumter, Friday, 16 October

Overcast. High 51°, low 42°.

Pressure30.53 inHg
Wind17.9 mph NW
Humidity50%
Visibility—
Dew point29°
Sat, 1752° / 33°0Clear
52 °Clear

Sumter, Saturday, 17 October

Clear. High 52°, low 33°.

Pressure30.59 inHg
Wind9.6 mph W
Humidity34%
Visibility—
Dew point19°
Sun, 1861° / 38°0Mostly clear
61 °Mostly clear

Sumter, Sunday, 18 October

Mostly clear. High 61°, low 38°.

Pressure30.42 inHg
Wind12.8 mph S
Humidity26%
Visibility—
Dew point21°
Mon, 1965° / 42°0Clear
65 °Clear

Sumter, Monday, 19 October

Clear. High 65°, low 42°.

Pressure30.21 inHg
Wind17.9 mph S
Humidity29%
Visibility—
Dew point27°
Tue, 2067° / 50°0Overcast
67 °Overcast

Sumter, Tuesday, 20 October

Overcast. High 67°, low 50°.

Pressure29.97 inHg
Wind13.6 mph SW
Humidity50%
Visibility—
Dew point42°
Wed, 2165° / 50°0Clear
65 °Clear

Sumter, Wednesday, 21 October

Clear. High 65°, low 50°.

Pressure30.00 inHg
Wind13 mph NW
Humidity49%
Visibility—
Dew point42°
Thu, 2268° / 48°0Overcast
68 °Overcast

Sumter, Thursday, 22 October

Overcast. High 68°, low 48°.

Pressure30.09 inHg
Wind5.5 mph W
Humidity44%
Visibility—
Dew point40°
Fri, 2370° / 48°0Clear
70 °Clear

Sumter, Friday, 23 October

Clear. High 70°, low 48°.

Pressure30.18 inHg
Wind7.9 mph SE
Humidity35%
Visibility—
Dew point36°
From day 17 onward the outlook is built from 60-year climate statistics
Sat, 2454° / 38°0.06Climate normal
54 °Climate normal

Sumter, Saturday, 24 October

Climate normal for this date — 60-year average.

Average high54°
Average low38°
Average precipitation0.06 in
Chance of precipitation27%
Record high77° (1989)
Record low16° (2020)
Sun, 2553° / 39°0.04Climate normal
53 °Climate normal

Sumter, Sunday, 25 October

Climate normal for this date — 60-year average.

Average high53°
Average low39°
Average precipitation0.04 in
Chance of precipitation22%
Record high79° (1989)
Record low20° (2020)
Mon, 2654° / 38°0.06Climate normal
54 °Climate normal

Sumter, Monday, 26 October

Climate normal for this date — 60-year average.

Average high54°
Average low38°
Average precipitation0.06 in
Chance of precipitation17%
Record high78° (1989)
Record low15° (2020)
Tue, 2753° / 38°0.09Climate normal
53 °Climate normal

Sumter, Tuesday, 27 October

Climate normal for this date — 60-year average.

Average high53°
Average low38°
Average precipitation0.09 in
Chance of precipitation27%
Record high71° (1983)
Record low7° (2020)
Wed, 2851° / 37°0.06Climate normal
51 °Climate normal

Sumter, Wednesday, 28 October

Climate normal for this date — 60-year average.

Average high51°
Average low37°
Average precipitation0.06 in
Chance of precipitation17%
Record high74° (2024)
Record low20° (1967)
Thu, 2952° / 37°0.07Climate normal
52 °Climate normal

Sumter, Thursday, 29 October

Climate normal for this date — 60-year average.

Average high52°
Average low37°
Average precipitation0.07 in
Chance of precipitation28%
Record high76° (2024)
Record low22° (1988)
Fri, 3051° / 37°0.07Climate normal
51 °Climate normal

Sumter, Friday, 30 October

Climate normal for this date — 60-year average.

Average high51°
Average low37°
Average precipitation0.07 in
Chance of precipitation30%
Record high68° (1965)
Record low21° (1991)
Sat, 3150° / 36°0.13Climate normal
50 °Climate normal

Sumter, Saturday, 31 October

Climate normal for this date — 60-year average.

Average high50°
Average low36°
Average precipitation0.13 in
Chance of precipitation30%
Record high70° (2000)
Record low19° (1996)
Sun, 0149° / 35°0.09Climate normal
49 °Climate normal

Sumter, Sunday, 1 November

Climate normal for this date — 60-year average.

Average high49°
Average low35°
Average precipitation0.09 in
Chance of precipitation20%
Record high70° (1990)
Record low19° (2024)
Mon, 0248° / 34°0.06Climate normal
48 °Climate normal

Sumter, Monday, 2 November

Climate normal for this date — 60-year average.

Average high48°
Average low34°
Average precipitation0.06 in
Chance of precipitation17%
Record high74° (2022)
Record low12° (1991)
Tue, 0348° / 34°0.05Climate normal
48 °Climate normal

Sumter, Tuesday, 3 November

Climate normal for this date — 60-year average.

Average high48°
Average low34°
Average precipitation0.05 in
Chance of precipitation20%
Record high72° (2008)
Record low8° (1991)
Wed, 0447° / 33°0.04Climate normal
47 °Climate normal

Sumter, Wednesday, 4 November

Climate normal for this date — 60-year average.

Average high47°
Average low33°
Average precipitation0.04 in
Chance of precipitation17%
Record high71° (2020)
Record low-5° (1991)
Thu, 0548° / 33°0.05Climate normal
48 °Climate normal

Sumter, Thursday, 5 November

Climate normal for this date — 60-year average.

Average high48°
Average low33°
Average precipitation0.05 in
Chance of precipitation25%
Record high69° (1975)
Record low6° (1991)
Fri, 0647° / 33°0.05Climate normal
47 °Climate normal

Sumter, Friday, 6 November

Climate normal for this date — 60-year average.

Average high47°
Average low33°
Average precipitation0.05 in
Chance of precipitation18%
Record high73° (2020)
Record low-1° (1991)

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 Sumter, MN 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 Sumter, MN 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.