Monthly outlook for Grass Lake, MN: average high 56.4°, average low 39.7°. That is 3.4° above the climate normal for October. Precipitation is expected on 3 days (about 0.6 inches), against a normal of 4 days and 1.2 inches. The warmest day looks like 22 October (69.1°), the coolest 27 October (27.8°).
56.4°/39.7°
Average high / low
+3.4°
Above normal
3 / 4
Wet days / normal
0.6 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
19 October – 28 October
58.5°
51.9°
+3.7°
29 October – 7 November
52.9°
46.5°
+3.6°
8 November – 17 November
at normal
40.1°
—
October records over 66 years
86.5°4 October 2025All-time high
16.2°23 October 2002All-time low
Climate normals and records are computed from the nearest reference point — Braham (4 mi).
Tue, 2064° / 44°0
64 °
Grass Lake, Tuesday, 20 October
Clear. High 64°, low 44°.
Pressure30.30 inHg
Wind8.7 mph S
Humidity64%
Visibility6.2 mi
Dew point47°
Wed, 2167° / 45°0
67 °
Grass Lake, Wednesday, 21 October
Clear. High 67°, low 45°.
Pressure30.24 inHg
Wind1.4 mph SW
Humidity67%
Visibility6.2 mi
Dew point50°
Thu, 2269° / 44°0
69 °
Grass Lake, Thursday, 22 October
Clear. High 69°, low 44°.
Pressure30.30 inHg
Wind6.4 mph SE
Humidity71%
Visibility6.2 mi
Dew point52°
Fri, 2369° / 54°0
69 °
Grass Lake, Friday, 23 October
Overcast. High 69°, low 54°.
Pressure30.18 inHg
Wind15.5 mph S
Humidity57%
Visibility—
Dew point50°
Sat, 2463° / 50°0.22
63 °
Grass Lake, Saturday, 24 October
Rain. High 63°, low 50°.
Pressure30.09 inHg
Wind14.4 mph S
Humidity63%
Visibility—
Dew point49°
Sun, 2547° / 36°0
47 °
Grass Lake, Sunday, 25 October
Mostly clear. High 47°, low 36°.
Pressure30.24 inHg
Wind18.6 mph W
Humidity38%
Visibility—
Dew point21°
Mon, 2640° / 34°0.07
40 °
Grass Lake, Monday, 26 October
Light rain. High 40°, low 34°.
Pressure30.12 inHg
Wind12.4 mph N
Humidity71%
Visibility—
Dew point30°
Tue, 2746° / 28°0
46 °
Grass Lake, Tuesday, 27 October
Clear. High 46°, low 28°.
Pressure30.30 inHg
Wind6 mph N
Humidity44%
Visibility—
Dew point22°
Wed, 2853° / 31°0
53 °
Grass Lake, Wednesday, 28 October
Mostly clear. High 53°, low 31°.
Pressure30.15 inHg
Wind12 mph S
Humidity59%
Visibility—
Dew point35°
Thu, 2958° / 47°0.03
58 °
Grass Lake, Thursday, 29 October
Light rain. High 58°, low 47°.
Pressure29.85 inHg
Wind19.6 mph SE
Humidity87%
Visibility—
Dew point50°
Fri, 3060° / 44°0.21
60 °
Grass Lake, Friday, 30 October
Light rain. High 60°, low 44°.
Pressure29.35 inHg
Wind29.3 mph SW
Humidity38%
Visibility—
Dew point32°
Sat, 3146° / 33°0
46 °
Grass Lake, Saturday, 31 October
Overcast. High 46°, low 33°.
Pressure29.94 inHg
Wind24.2 mph W
Humidity52%
Visibility—
Dew point27°
Sun, 0150° / 28°0
50 °
Grass Lake, Sunday, 1 November
Partly cloudy. High 50°, low 28°.
Pressure29.71 inHg
Wind12.6 mph W
Humidity29%
Visibility—
Dew point14°
Mon, 0254° / 31°0
54 °
Grass Lake, Monday, 2 November
Overcast. High 54°, low 31°.
Pressure29.85 inHg
Wind11.4 mph S
Humidity37%
Visibility—
Dew point22°
Tue, 0349° / 44°0.01
49 °
Grass Lake, Tuesday, 3 November
Light rain. High 49°, low 44°.
Pressure29.65 inHg
Wind15.8 mph SE
Humidity87%
Visibility—
Dew point45°
From day 17 onward the outlook is built from 60-year climate statistics
Wed, 0445° / 32°0.05
45 °
Grass Lake, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high45°
Average low32°
Average precipitation0.05 in
Chance of precipitation27%
Record high65° (2008)
Record low-4° (1991)
Thu, 0545° / 32°0.04
45 °
Grass Lake, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high45°
Average low32°
Average precipitation0.04 in
Chance of precipitation23%
Record high65° (2016)
Record low7° (1991)
Fri, 0645° / 32°0.07
45 °
Grass Lake, Friday, 6 November
Climate normal for this date — 60-year average.
Average high45°
Average low32°
Average precipitation0.07 in
Chance of precipitation20%
Record high69° (2020)
Record low4° (1991)
Sat, 0744° / 32°0.03
44 °
Grass Lake, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high44°
Average low32°
Average precipitation0.03 in
Chance of precipitation18%
Record high67° (2020)
Record low-9° (1991)
Sun, 0844° / 31°0.04
44 °
Grass Lake, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high44°
Average low31°
Average precipitation0.04 in
Chance of precipitation20%
Record high69° (2020)
Record low1° (1991)
Mon, 0943° / 31°0.09
43 °
Grass Lake, Monday, 9 November
Climate normal for this date — 60-year average.
Average high43°
Average low31°
Average precipitation0.09 in
Chance of precipitation33%
Record high66° (1999)
Record low9° (2003)
Tue, 1040° / 30°0.11
40 °
Grass Lake, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high40°
Average low30°
Average precipitation0.11 in
Chance of precipitation32%
Record high62° (2016)
Record low8° (2017)
Wed, 1139° / 28°0.06
39 °
Grass Lake, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high39°
Average low28°
Average precipitation0.06 in
Chance of precipitation23%
Record high58° (1964)
Record low8° (1986)
Thu, 1238° / 26°0.06
38 °
Grass Lake, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high38°
Average low26°
Average precipitation0.06 in
Chance of precipitation27%
Record high57° (2001)
Record low-9° (1966)
Fri, 1340° / 27°0.07
40 °
Grass Lake, Friday, 13 November
Climate normal for this date — 60-year average.
Average high40°
Average low27°
Average precipitation0.07 in
Chance of precipitation27%
Record high66° (1999)
Record low-3° (1982)
Sat, 1440° / 28°0.03
40 °
Grass Lake, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high40°
Average low28°
Average precipitation0.03 in
Chance of precipitation17%
Record high62° (2025)
Record low2° (2014)
Sun, 1540° / 28°0.04
40 °
Grass Lake, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high40°
Average low28°
Average precipitation0.04 in
Chance of precipitation15%
Record high62° (2001)
Record low-2° (2014)
Mon, 1640° / 27°0.09
40 °
Grass Lake, Monday, 16 November
Climate normal for this date — 60-year average.
Average high40°
Average low27°
Average precipitation0.09 in
Chance of precipitation22%
Record high63° (2023)
Record low4° (1997)
Tue, 1738° / 27°0.07
38 °
Grass Lake, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high38°
Average low27°
Average precipitation0.07 in
Chance of precipitation23%
Record high65° (2001)
Record low7° (2014)
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 Grass Lake, 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 Grass Lake, 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.