Monthly outlook for Harmon, ND: average high 58.2°, average low 43.2°. That is 1.2° above the climate normal for October. Precipitation is expected on 5 days (about 1.6 inches), against a normal of 3 days and 0.8 inches. The warmest day looks like 10 October (75.2°), the coolest 17 October (35.6°).
58.2°/43.2°
Average high / low
+1.2°
Above normal
5 / 3
Wet days / normal
1.6 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 October – 17 October
56.9°
56.9°
-0.1°
18 October – 27 October
60.4°
53.5°
+3.8°
28 October – 6 November
at normal
46.5°
—
October records over 66 years
90°4 October 1963All-time high
-4.2°30 October 1991All-time low
Climate normals and records are computed from the nearest reference point — Bismarck (12 mi).
Fri, 0975° / 42°0
75 °
Harmon, Friday, 9 October
Partly cloudy. High 75°, low 42°.
Pressure29.77 inHg
Wind13.8 mph SE
Humidity58%
Visibility6.2 mi
Dew point47°
Sat, 1075° / 54°0
75 °
Harmon, Saturday, 10 October
Clear. High 75°, low 54°.
Pressure29.44 inHg
Wind4.5 mph NE
Humidity67%
Visibility6.2 mi
Dew point56°
Sun, 1156° / 44°0.3
56 °
Harmon, Sunday, 11 October
Rain. High 56°, low 44°.
Pressure29.88 inHg
Wind14.7 mph N
Humidity93%
Visibility2.5 mi
Dew point47°
Mon, 1243° / 40°0.2
43 °
Harmon, Monday, 12 October
Light rain. High 43°, low 40°.
Pressure30.03 inHg
Wind12.3 mph N
Humidity90%
Visibility—
Dew point39°
Tue, 1350° / 39°0
50 °
Harmon, Tuesday, 13 October
Overcast. High 50°, low 39°.
Pressure30.21 inHg
Wind10.9 mph SE
Humidity63%
Visibility—
Dew point32°
Wed, 1456° / 51°0.31
56 °
Harmon, Wednesday, 14 October
Rain. High 56°, low 51°.
Pressure29.41 inHg
Wind12.6 mph SE
Humidity96%
Visibility—
Dew point54°
Thu, 1555° / 45°0.63
55 °
Harmon, Thursday, 15 October
Rain. High 55°, low 45°.
Pressure29.38 inHg
Wind22.6 mph NW
Humidity86%
Visibility—
Dew point49°
Fri, 1642° / 39°0.17
42 °
Harmon, Friday, 16 October
Rain. High 42°, low 39°.
Pressure30.42 inHg
Wind21.3 mph NW
Humidity76%
Visibility—
Dew point34°
Sat, 1749° / 36°0
49 °
Harmon, Saturday, 17 October
Mostly clear. High 49°, low 36°.
Pressure30.30 inHg
Wind14.8 mph S
Humidity56%
Visibility—
Dew point32°
Sun, 1857° / 39°0
57 °
Harmon, Sunday, 18 October
Mostly clear. High 57°, low 39°.
Pressure30.18 inHg
Wind7.9 mph NW
Humidity52%
Visibility—
Dew point35°
Mon, 1962° / 41°0
62 °
Harmon, Monday, 19 October
Partly cloudy. High 62°, low 41°.
Pressure30.06 inHg
Wind9.9 mph S
Humidity45%
Visibility—
Dew point34°
Tue, 2061° / 44°0
61 °
Harmon, Tuesday, 20 October
Partly cloudy. High 61°, low 44°.
Pressure30.09 inHg
Wind7.5 mph S
Humidity45%
Visibility—
Dew point35°
Wed, 2167° / 47°0
67 °
Harmon, Wednesday, 21 October
Overcast. High 67°, low 47°.
Pressure29.53 inHg
Wind10.9 mph S
Humidity39%
Visibility—
Dew point36°
Thu, 2260° / 47°0
60 °
Harmon, Thursday, 22 October
Light rain. High 60°, low 47°.
Pressure29.35 inHg
Wind22.4 mph W
Humidity49%
Visibility—
Dew point32°
Fri, 2354° / 40°0
54 °
Harmon, Friday, 23 October
Overcast. High 54°, low 40°.
Pressure29.68 inHg
Wind11.3 mph W
Humidity49%
Visibility—
Dew point30°
From day 17 onward the outlook is built from 60-year climate statistics
Sat, 2452° / 35°0.03
52 °
Harmon, Saturday, 24 October
Climate normal for this date — 60-year average.
Average high52°
Average low35°
Average precipitation0.03 in
Chance of precipitation15%
Record high75° (1989)
Record low12° (2020)
Sun, 2553° / 35°0.02
53 °
Harmon, Sunday, 25 October
Climate normal for this date — 60-year average.
Average high53°
Average low35°
Average precipitation0.02 in
Chance of precipitation20%
Record high74° (1989)
Record low18° (2020)
Mon, 2653° / 35°0.04
53 °
Harmon, Monday, 26 October
Climate normal for this date — 60-year average.
Average high53°
Average low35°
Average precipitation0.04 in
Chance of precipitation18%
Record high77° (1990)
Record low13° (2020)
Tue, 2751° / 34°0.06
51 °
Harmon, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high51°
Average low34°
Average precipitation0.06 in
Chance of precipitation28%
Record high73° (1983)
Record low14° (2023)
Wed, 2850° / 33°0.07
50 °
Harmon, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high50°
Average low33°
Average precipitation0.07 in
Chance of precipitation13%
Record high67° (2016)
Record low10° (2023)
Thu, 2948° / 33°0.08
48 °
Harmon, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high48°
Average low33°
Average precipitation0.08 in
Chance of precipitation28%
Record high69° (2007)
Record low8° (1991)
Fri, 3047° / 32°0.03
47 °
Harmon, Friday, 30 October
Climate normal for this date — 60-year average.
Average high47°
Average low32°
Average precipitation0.03 in
Chance of precipitation18%
Record high65° (2008)
Record low-4° (1991)
Sat, 3147° / 31°0.04
47 °
Harmon, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high47°
Average low31°
Average precipitation0.04 in
Chance of precipitation18%
Record high70° (1990)
Record low-3° (1991)
Sun, 0146° / 31°0.06
46 °
Harmon, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high46°
Average low31°
Average precipitation0.06 in
Chance of precipitation20%
Record high66° (1983)
Record low6° (2003)
Mon, 0247° / 30°0.02
47 °
Harmon, Monday, 2 November
Climate normal for this date — 60-year average.
Average high47°
Average low30°
Average precipitation0.02 in
Chance of precipitation17%
Record high73° (2022)
Record low6° (1991)
Tue, 0345° / 31°0.03
45 °
Harmon, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high45°
Average low31°
Average precipitation0.03 in
Chance of precipitation15%
Record high68° (2020)
Record low-4° (1991)
Wed, 0446° / 29°0.02
46 °
Harmon, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high46°
Average low29°
Average precipitation0.02 in
Chance of precipitation12%
Record high71° (2020)
Record low-6° (1991)
Thu, 0545° / 29°0.03
45 °
Harmon, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high45°
Average low29°
Average precipitation0.03 in
Chance of precipitation18%
Record high71° (2020)
Record low3° (2003)
Fri, 0644° / 28°0.03
44 °
Harmon, Friday, 6 November
Climate normal for this date — 60-year average.
Average high44°
Average low28°
Average precipitation0.03 in
Chance of precipitation12%
Record high67° (2016)
Record low-4° (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 Harmon, ND 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 Harmon, ND 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.