Monthly outlook for Grafton, ND: average high 81.2°, average low 58.3°. That is 2.2° above the climate normal for August. Precipitation is expected on 2 days (about 0.5 inches), against a normal of 5 days and 1.5 inches. The warmest day looks like 17 August (93.3°), the coolest 19 August (53.3°).
81.2°/58.3°
Average high / low
+2.2°
Above normal
2 / 5
Wet days / normal
0.5 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 August – 17 August
82.4°
77.6°
+2.7°
18 August – 27 August
79.1°
76.6°
+1.4°
28 August – 6 September
at normal
74.2°
—
August records over 66 years
100.6°16 August 2021All-time high
37.6°27 August 1982All-time low
Climate normals and records are computed from the nearest reference point — St. Thomas (14 mi).
Sun, 0978° / 55°0
78 °
Grafton, Sunday, 9 August
Overcast. High 78°, low 55°.
Pressure29.91 inHg
Wind9.5 mph N
Humidity39%
Visibility6.2 mi
Dew point48°
Mon, 1082° / 59°0
82 °
Grafton, Monday, 10 August
Overcast. High 82°, low 59°.
Pressure29.94 inHg
Wind5 mph E
Humidity36%
Visibility6.2 mi
Dew point47°
Tue, 1183° / 57°0
83 °
Grafton, Tuesday, 11 August
Clear. High 83°, low 57°.
Pressure29.94 inHg
Wind9.8 mph N
Humidity30%
Visibility6.2 mi
Dew point44°
Wed, 1279° / 61°0
79 °
Grafton, Wednesday, 12 August
Partly cloudy. High 79°, low 61°.
Pressure30.03 inHg
Wind9.2 mph N
Humidity35%
Visibility6.2 mi
Dew point46°
Thu, 1379° / 54°0
79 °
Grafton, Thursday, 13 August
Partly cloudy. High 79°, low 54°.
Pressure30.09 inHg
Wind8.8 mph N
Humidity30%
Visibility—
Dew point39°
Fri, 1486° / 55°0
86 °
Grafton, Friday, 14 August
Overcast. High 86°, low 55°.
Pressure30.12 inHg
Wind8.6 mph E
Humidity23%
Visibility—
Dew point37°
Sat, 1579° / 69°0.01
79 °
Grafton, Saturday, 15 August
Light rain. High 79°, low 69°.
Pressure30.06 inHg
Wind18.4 mph SW
Humidity54%
Visibility—
Dew point57°
Sun, 1683° / 56°0
83 °
Grafton, Sunday, 16 August
Overcast. High 83°, low 56°.
Pressure30.09 inHg
Wind8.5 mph NW
Humidity32%
Visibility—
Dew point42°
Mon, 1793° / 59°0.18
93 °
Grafton, Monday, 17 August
Rain. High 93°, low 59°.
Pressure29.88 inHg
Wind15.6 mph S
Humidity21%
Visibility—
Dew point40°
Tue, 1873° / 61°0
73 °
Grafton, Tuesday, 18 August
Partly cloudy. High 73°, low 61°.
Pressure29.94 inHg
Wind20.1 mph NW
Humidity43%
Visibility—
Dew point48°
Wed, 1979° / 53°0
79 °
Grafton, Wednesday, 19 August
Clear. High 79°, low 53°.
Pressure30.15 inHg
Wind10.3 mph N
Humidity28%
Visibility—
Dew point38°
Thu, 2084° / 57°0
84 °
Grafton, Thursday, 20 August
Partly cloudy. High 84°, low 57°.
Pressure30.03 inHg
Wind8.4 mph E
Humidity20%
Visibility—
Dew point33°
Fri, 2184° / 61°0
84 °
Grafton, Friday, 21 August
Overcast. High 84°, low 61°.
Pressure29.83 inHg
Wind19.9 mph S
Humidity37%
Visibility—
Dew point49°
Sat, 2277° / 62°0.34
77 °
Grafton, Saturday, 22 August
Rain. High 77°, low 62°.
Pressure29.59 inHg
Wind22.1 mph NW
Humidity41%
Visibility—
Dew point49°
Sun, 2377° / 60°0
77 °
Grafton, Sunday, 23 August
Overcast. High 77°, low 60°.
Pressure29.97 inHg
Wind19.1 mph NW
Humidity43%
Visibility—
Dew point47°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2478° / 60°0.09
78 °
Grafton, Monday, 24 August
Climate normal for this date — 60-year average.
Average high78°
Average low60°
Average precipitation0.09 in
Chance of precipitation27%
Record high97° (1976)
Record low46° (1977)
Tue, 2576° / 59°0.06
76 °
Grafton, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high76°
Average low59°
Average precipitation0.06 in
Chance of precipitation22%
Record high93° (2013)
Record low46° (2015)
Wed, 2676° / 58°0.07
76 °
Grafton, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high76°
Average low58°
Average precipitation0.07 in
Chance of precipitation25%
Record high93° (1984)
Record low42° (1992)
Thu, 2776° / 57°0.07
76 °
Grafton, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high76°
Average low57°
Average precipitation0.07 in
Chance of precipitation30%
Record high95° (1984)
Record low38° (1982)
Fri, 2876° / 58°0.11
76 °
Grafton, Friday, 28 August
Climate normal for this date — 60-year average.
Average high76°
Average low58°
Average precipitation0.11 in
Chance of precipitation33%
Record high99° (1991)
Record low40° (1965)
Sat, 2976° / 58°0.1
76 °
Grafton, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high76°
Average low58°
Average precipitation0.1 in
Chance of precipitation23%
Record high96° (2012)
Record low46° (1974)
Sun, 3075° / 56°0.09
75 °
Grafton, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high75°
Average low56°
Average precipitation0.09 in
Chance of precipitation27%
Record high89° (1990)
Record low44° (2009)
Mon, 3175° / 57°0.1
75 °
Grafton, Monday, 31 August
Climate normal for this date — 60-year average.
Average high75°
Average low57°
Average precipitation0.1 in
Chance of precipitation35%
Record high89° (2008)
Record low43° (1970)
Tue, 0174° / 56°0.12
74 °
Grafton, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high74°
Average low56°
Average precipitation0.12 in
Chance of precipitation33%
Record high95° (1983)
Record low39° (1974)
Wed, 0273° / 56°0.07
73 °
Grafton, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high73°
Average low56°
Average precipitation0.07 in
Chance of precipitation32%
Record high98° (1983)
Record low38° (1974)
Thu, 0374° / 56°0.07
74 °
Grafton, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high74°
Average low56°
Average precipitation0.07 in
Chance of precipitation25%
Record high91° (1990)
Record low42° (1974)
Fri, 0473° / 56°0.1
73 °
Grafton, Friday, 4 September
Climate normal for this date — 60-year average.
Average high73°
Average low56°
Average precipitation0.1 in
Chance of precipitation23%
Record high91° (2023)
Record low40° (1962)
Sat, 0573° / 55°0.1
73 °
Grafton, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high73°
Average low55°
Average precipitation0.1 in
Chance of precipitation28%
Record high96° (1978)
Record low40° (1965)
Sun, 0672° / 54°0.11
72 °
Grafton, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high72°
Average low54°
Average precipitation0.11 in
Chance of precipitation32%
Record high92° (1976)
Record low38° (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 Grafton, 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 Grafton, 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.