Monthly outlook for Portland, ND: average high 82°, average low 58.7°. That is 2.3° above the climate normal for August. Precipitation is expected on 2 days (about 1.0 inches), against a normal of 5 days and 1.6 inches. The warmest day looks like 17 August (92.3°), the coolest 19 August (53.8°).
82°/58.7°
Average high / low
+2.3°
Above normal
2 / 5
Wet days / normal
1.0 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
82.8°
78°
+2.7°
19 August – 28 August
80.7°
77.3°
+1.9°
29 August – 7 September
at normal
74.6°
—
August records over 66 years
98.4°19 August 1976All-time high
40.5°28 August 1965All-time low
Climate normals and records are computed from the nearest reference point — Clifford (11 mi).
Mon, 1087° / 57°0
87 °
Portland, Monday, 10 August
Overcast. High 87°, low 57°.
Pressure29.88 inHg
Wind8.1 mph E
Humidity26%
Visibility6.2 mi
Dew point44°
Tue, 1186° / 58°0
86 °
Portland, Tuesday, 11 August
Clear. High 86°, low 58°.
Pressure29.91 inHg
Wind11.3 mph N
Humidity27%
Visibility6.2 mi
Dew point44°
Wed, 1280° / 61°0
80 °
Portland, Wednesday, 12 August
Overcast. High 80°, low 61°.
Pressure30.03 inHg
Wind9.3 mph NE
Humidity39%
Visibility6.2 mi
Dew point46°
Thu, 1381° / 58°0
81 °
Portland, Thursday, 13 August
Light rain. High 81°, low 58°.
Pressure30.06 inHg
Wind10.2 mph NE
Humidity29%
Visibility—
Dew point39°
Fri, 1488° / 56°0
88 °
Portland, Friday, 14 August
Overcast. High 88°, low 56°.
Pressure30.12 inHg
Wind8 mph E
Humidity21%
Visibility—
Dew point36°
Sat, 1575° / 65°0.03
75 °
Portland, Saturday, 15 August
Light rain. High 75°, low 65°.
Pressure30.12 inHg
Wind13.8 mph S
Humidity83%
Visibility—
Dew point61°
Sun, 1681° / 57°0
81 °
Portland, Sunday, 16 August
Overcast. High 81°, low 57°.
Pressure30.09 inHg
Wind9.1 mph W
Humidity29%
Visibility—
Dew point40°
Mon, 1792° / 59°0.68
92 °
Portland, Monday, 17 August
Heavy rain. High 92°, low 59°.
Pressure29.91 inHg
Wind13.3 mph S
Humidity32%
Visibility—
Dew point50°
Tue, 1878° / 62°0.02
78 °
Portland, Tuesday, 18 August
Light rain. High 78°, low 62°.
Pressure29.94 inHg
Wind17.4 mph NW
Humidity43%
Visibility—
Dew point49°
Wed, 1979° / 54°0
79 °
Portland, Wednesday, 19 August
Partly cloudy. High 79°, low 54°.
Pressure30.15 inHg
Wind13.4 mph N
Humidity35%
Visibility—
Dew point43°
Thu, 2082° / 57°0
82 °
Portland, Thursday, 20 August
Partly cloudy. High 82°, low 57°.
Pressure30.03 inHg
Wind7.9 mph E
Humidity22%
Visibility—
Dew point35°
Fri, 2186° / 60°0
86 °
Portland, Friday, 21 August
Overcast. High 86°, low 60°.
Pressure29.83 inHg
Wind23.1 mph SE
Humidity36%
Visibility—
Dew point49°
Sat, 2278° / 65°0.21
78 °
Portland, Saturday, 22 August
Rain. High 78°, low 65°.
Pressure29.62 inHg
Wind21.8 mph NW
Humidity39%
Visibility—
Dew point49°
Sun, 2379° / 57°0
79 °
Portland, Sunday, 23 August
Partly cloudy. High 79°, low 57°.
Pressure29.97 inHg
Wind16.1 mph NW
Humidity43%
Visibility—
Dew point48°
Mon, 2479° / 60°0.01
79 °
Portland, Monday, 24 August
Light rain. High 79°, low 60°.
Pressure29.77 inHg
Wind16.7 mph S
Humidity46%
Visibility—
Dew point54°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2577° / 60°0.11
77 °
Portland, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high77°
Average low60°
Average precipitation0.11 in
Chance of precipitation28%
Record high94° (2013)
Record low45° (2025)
Wed, 2677° / 59°0.11
77 °
Portland, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high77°
Average low59°
Average precipitation0.11 in
Chance of precipitation35%
Record high92° (1991)
Record low44° (1992)
Thu, 2777° / 58°0.08
77 °
Portland, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high77°
Average low58°
Average precipitation0.08 in
Chance of precipitation32%
Record high96° (1984)
Record low42° (1982)
Fri, 2877° / 59°0.13
77 °
Portland, Friday, 28 August
Climate normal for this date — 60-year average.
Average high77°
Average low59°
Average precipitation0.13 in
Chance of precipitation32%
Record high98° (1991)
Record low40° (1965)
Sat, 2977° / 59°0.09
77 °
Portland, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high77°
Average low59°
Average precipitation0.09 in
Chance of precipitation28%
Record high92° (1961)
Record low47° (1988)
Sun, 3075° / 58°0.1
75 °
Portland, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high75°
Average low58°
Average precipitation0.1 in
Chance of precipitation30%
Record high93° (1961)
Record low46° (2009)
Mon, 3176° / 59°0.05
76 °
Portland, Monday, 31 August
Climate normal for this date — 60-year average.
Average high76°
Average low59°
Average precipitation0.05 in
Chance of precipitation23%
Record high90° (1979)
Record low43° (1987)
Tue, 0175° / 58°0.09
75 °
Portland, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high75°
Average low58°
Average precipitation0.09 in
Chance of precipitation33%
Record high90° (1983)
Record low41° (1974)
Wed, 0274° / 58°0.11
74 °
Portland, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high74°
Average low58°
Average precipitation0.11 in
Chance of precipitation27%
Record high96° (1983)
Record low38° (1974)
Thu, 0375° / 57°0.06
75 °
Portland, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high75°
Average low57°
Average precipitation0.06 in
Chance of precipitation17%
Record high90° (2007)
Record low41° (1974)
Fri, 0474° / 58°0.12
74 °
Portland, Friday, 4 September
Climate normal for this date — 60-year average.
Average high74°
Average low58°
Average precipitation0.12 in
Chance of precipitation23%
Record high94° (1979)
Record low41° (2025)
Sat, 0574° / 57°0.12
74 °
Portland, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high74°
Average low57°
Average precipitation0.12 in
Chance of precipitation27%
Record high93° (1978)
Record low39° (1965)
Sun, 0674° / 55°0.11
74 °
Portland, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high74°
Average low55°
Average precipitation0.11 in
Chance of precipitation30%
Record high94° (1978)
Record low40° (1968)
Mon, 0772° / 54°0.08
72 °
Portland, Monday, 7 September
Climate normal for this date — 60-year average.
Average high72°
Average low54°
Average precipitation0.08 in
Chance of precipitation28%
Record high91° (1976)
Record low37° (2025)
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 Portland, 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 Portland, 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.