Monthly outlook for Casselton, ND: average high 84.3°, average low 58.6°. That is 3.2° above the climate normal for August. Precipitation is expected on 3 days (about 0.7 inches), against a normal of 5 days and 1.6 inches. The warmest day looks like 17 August (94.3°), the coolest 19 August (53.3°).
84.3°/58.6°
Average high / low
+3.2°
Above normal
3 / 5
Wet days / normal
0.7 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 August – 17 August
85.4°
78.8°
+3.7°
18 August – 27 August
82.4°
78°
+2.5°
28 August – 6 September
at normal
75.9°
—
August records over 66 years
99.5°19 August 1976All-time high
41.7°28 August 1986All-time low
Climate normals and records are computed from the nearest reference point — Amenia (8 mi).
Sun, 0983° / 55°0.04
83 °
Casselton, Sunday, 9 August
Light rain. High 83°, low 55°.
Pressure29.88 inHg
Wind11 mph N
Humidity33%
Visibility6.2 mi
Dew point48°
Mon, 1093° / 56°0
93 °
Casselton, Monday, 10 August
Overcast. High 93°, low 56°.
Pressure29.88 inHg
Wind9.1 mph E
Humidity24%
Visibility6.2 mi
Dew point44°
Tue, 1189° / 60°0
89 °
Casselton, Tuesday, 11 August
Partly cloudy. High 89°, low 60°.
Pressure29.91 inHg
Wind9.8 mph NE
Humidity27%
Visibility6.2 mi
Dew point45°
Wed, 1282° / 60°0
82 °
Casselton, Wednesday, 12 August
Overcast. High 82°, low 60°.
Pressure30.03 inHg
Wind9.6 mph NE
Humidity36%
Visibility6.2 mi
Dew point46°
Thu, 1382° / 61°0
82 °
Casselton, Thursday, 13 August
Overcast. High 82°, low 61°.
Pressure30.06 inHg
Wind10.3 mph NE
Humidity30%
Visibility—
Dew point42°
Fri, 1489° / 58°0
89 °
Casselton, Friday, 14 August
Partly cloudy. High 89°, low 58°.
Pressure30.09 inHg
Wind9.8 mph S
Humidity21%
Visibility—
Dew point37°
Sat, 1573° / 63°0.01
73 °
Casselton, Saturday, 15 August
Light rain. High 73°, low 63°.
Pressure30.12 inHg
Wind10.9 mph SW
Humidity57%
Visibility—
Dew point56°
Sun, 1683° / 58°0
83 °
Casselton, Sunday, 16 August
Overcast. High 83°, low 58°.
Pressure30.09 inHg
Wind8.4 mph NW
Humidity32%
Visibility—
Dew point42°
Mon, 1794° / 59°0.09
94 °
Casselton, Monday, 17 August
Light rain. High 94°, low 59°.
Pressure29.94 inHg
Wind14.2 mph SW
Humidity33%
Visibility—
Dew point51°
Tue, 1882° / 62°0.03
82 °
Casselton, Tuesday, 18 August
Light rain. High 82°, low 62°.
Pressure29.94 inHg
Wind18.5 mph NW
Humidity36%
Visibility—
Dew point47°
Wed, 1981° / 53°0
81 °
Casselton, Wednesday, 19 August
Partly cloudy. High 81°, low 53°.
Pressure30.15 inHg
Wind13.3 mph N
Humidity32%
Visibility—
Dew point42°
Thu, 2085° / 59°0
85 °
Casselton, Thursday, 20 August
Partly cloudy. High 85°, low 59°.
Pressure30.03 inHg
Wind6.6 mph E
Humidity19%
Visibility—
Dew point33°
Fri, 2187° / 57°0
87 °
Casselton, Friday, 21 August
Overcast. High 87°, low 57°.
Pressure29.85 inHg
Wind22.7 mph SE
Humidity33%
Visibility—
Dew point47°
Sat, 2279° / 65°0.57
79 °
Casselton, Saturday, 22 August
Rain. High 79°, low 65°.
Pressure29.65 inHg
Wind24.2 mph NW
Humidity37%
Visibility—
Dew point49°
Sun, 2381° / 58°0
81 °
Casselton, Sunday, 23 August
Clear. High 81°, low 58°.
Pressure29.97 inHg
Wind14.1 mph NW
Humidity42%
Visibility—
Dew point48°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2479° / 62°0.08
79 °
Casselton, Monday, 24 August
Climate normal for this date — 60-year average.
Average high79°
Average low62°
Average precipitation0.08 in
Chance of precipitation20%
Record high96° (1976)
Record low51° (2008)
Tue, 2578° / 61°0.1
78 °
Casselton, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high78°
Average low61°
Average precipitation0.1 in
Chance of precipitation25%
Record high95° (1991)
Record low46° (2025)
Wed, 2678° / 60°0.12
78 °
Casselton, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high78°
Average low60°
Average precipitation0.12 in
Chance of precipitation40%
Record high98° (1991)
Record low44° (1992)
Thu, 2777° / 59°0.09
77 °
Casselton, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high77°
Average low59°
Average precipitation0.09 in
Chance of precipitation28%
Record high96° (1984)
Record low44° (1982)
Fri, 2878° / 60°0.13
78 °
Casselton, Friday, 28 August
Climate normal for this date — 60-year average.
Average high78°
Average low60°
Average precipitation0.13 in
Chance of precipitation33%
Record high99° (1984)
Record low42° (1986)
Sat, 2977° / 60°0.1
77 °
Casselton, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high77°
Average low60°
Average precipitation0.1 in
Chance of precipitation30%
Record high93° (1991)
Record low48° (1977)
Sun, 3076° / 59°0.11
76 °
Casselton, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high76°
Average low59°
Average precipitation0.11 in
Chance of precipitation27%
Record high94° (1961)
Record low44° (2009)
Mon, 3177° / 60°0.07
77 °
Casselton, Monday, 31 August
Climate normal for this date — 60-year average.
Average high77°
Average low60°
Average precipitation0.07 in
Chance of precipitation32%
Record high90° (1979)
Record low44° (1987)
Tue, 0175° / 59°0.09
75 °
Casselton, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high75°
Average low59°
Average precipitation0.09 in
Chance of precipitation38%
Record high90° (1983)
Record low42° (1974)
Wed, 0275° / 59°0.12
75 °
Casselton, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high75°
Average low59°
Average precipitation0.12 in
Chance of precipitation27%
Record high96° (1983)
Record low40° (1974)
Thu, 0376° / 58°0.06
76 °
Casselton, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high76°
Average low58°
Average precipitation0.06 in
Chance of precipitation15%
Record high92° (2007)
Record low41° (1974)
Fri, 0475° / 58°0.1
75 °
Casselton, Friday, 4 September
Climate normal for this date — 60-year average.
Average high75°
Average low58°
Average precipitation0.1 in
Chance of precipitation25%
Record high95° (1979)
Record low43° (1962)
Sat, 0575° / 58°0.12
75 °
Casselton, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high75°
Average low58°
Average precipitation0.12 in
Chance of precipitation25%
Record high94° (1978)
Record low40° (1965)
Sun, 0674° / 56°0.13
74 °
Casselton, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high74°
Average low56°
Average precipitation0.13 in
Chance of precipitation30%
Record high97° (1978)
Record low41° (1968)
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 Casselton, 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 Casselton, 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.