Monthly outlook for Riverton, ME: average high 58.3°, average low 42.9°. That is 0.7° above the climate normal for October. Precipitation is expected on 5 days (about 1.5 inches), against a normal of 5 days and 2.2 inches. The warmest day looks like 17 October (64°), the coolest 19 October (36.3°).
58.3°/42.9°
Average high / low
+0.7°
Above normal
5 / 5
Wet days / normal
1.5 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 October – 18 October
58.4°
57.9°
+0.3°
19 October – 28 October
58.1°
54.9°
+1.8°
29 October – 7 November
at normal
51.7°
—
October records over 66 years
84.2°3 October 2023All-time high
28.2°26 October 2018All-time low
Climate normals and records are computed from the nearest reference point — Portland (3 mi).
Sat, 1059° / 40°0
59 °
Riverton, Saturday, 10 October
Clear. High 59°, low 40°.
Pressure30.42 inHg
Wind5.8 mph W
Humidity47%
Visibility6.2 mi
Dew point34°
Sun, 1160° / 42°0.03
60 °
Riverton, Sunday, 11 October
Light rain. High 60°, low 42°.
Pressure30.39 inHg
Wind6.2 mph S
Humidity55%
Visibility6.2 mi
Dew point43°
Mon, 1263° / 50°0.32
63 °
Riverton, Monday, 12 October
Rain. High 63°, low 50°.
Pressure29.71 inHg
Wind4.3 mph N
Humidity96%
Visibility6.2 mi
Dew point55°
Tue, 1357° / 47°0.43
57 °
Riverton, Tuesday, 13 October
Rain. High 57°, low 47°.
Pressure29.88 inHg
Wind11.6 mph NE
Humidity97%
Visibility—
Dew point50°
Wed, 1447° / 43°0.31
47 °
Riverton, Wednesday, 14 October
Light rain. High 47°, low 43°.
Pressure29.97 inHg
Wind13.4 mph N
Humidity97%
Visibility—
Dew point46°
Thu, 1558° / 39°0
58 °
Riverton, Thursday, 15 October
Clear. High 58°, low 39°.
Pressure30.27 inHg
Wind5.4 mph N
Humidity37%
Visibility—
Dew point25°
Fri, 1659° / 44°0.05
59 °
Riverton, Friday, 16 October
Light rain. High 59°, low 44°.
Pressure30.21 inHg
Wind13.2 mph S
Humidity80%
Visibility—
Dew point44°
Sat, 1764° / 54°0.03
64 °
Riverton, Saturday, 17 October
Light rain. High 64°, low 54°.
Pressure29.91 inHg
Wind11.9 mph SW
Humidity80%
Visibility—
Dew point56°
Sun, 1853° / 40°0.33
53 °
Riverton, Sunday, 18 October
Rain. High 53°, low 40°.
Pressure30.27 inHg
Wind6.2 mph NE
Humidity91%
Visibility—
Dew point43°
Mon, 1954° / 36°0
54 °
Riverton, Monday, 19 October
Clear. High 54°, low 36°.
Pressure30.45 inHg
Wind5 mph SE
Humidity48%
Visibility—
Dew point29°
Tue, 2058° / 38°0
58 °
Riverton, Tuesday, 20 October
Clear. High 58°, low 38°.
Pressure30.53 inHg
Wind6.6 mph NE
Humidity41%
Visibility—
Dew point28°
Wed, 2154° / 40°0
54 °
Riverton, Wednesday, 21 October
Clear. High 54°, low 40°.
Pressure30.62 inHg
Wind6.9 mph E
Humidity58%
Visibility—
Dew point36°
Thu, 2262° / 40°0
62 °
Riverton, Thursday, 22 October
Clear. High 62°, low 40°.
Pressure30.36 inHg
Wind3.2 mph SE
Humidity46%
Visibility—
Dew point33°
Fri, 2358° / 43°0
58 °
Riverton, Friday, 23 October
Clear. High 58°, low 43°.
Pressure30.30 inHg
Wind6.6 mph SE
Humidity61%
Visibility—
Dew point40°
Sat, 2462° / 44°0
62 °
Riverton, Saturday, 24 October
Clear. High 62°, low 44°.
Pressure30.24 inHg
Wind5.3 mph SE
Humidity61%
Visibility—
Dew point42°
From day 17 onward the outlook is built from 60-year climate statistics
Sun, 2555° / 45°0.14
55 °
Riverton, Sunday, 25 October
Climate normal for this date — 60-year average.
Average high55°
Average low45°
Average precipitation0.14 in
Chance of precipitation32%
Record high72° (2023)
Record low33° (2018)
Mon, 2654° / 44°0.14
54 °
Riverton, Monday, 26 October
Climate normal for this date — 60-year average.
Average high54°
Average low44°
Average precipitation0.14 in
Chance of precipitation30%
Record high75° (2023)
Record low28° (2018)
Tue, 2753° / 43°0.12
53 °
Riverton, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high53°
Average low43°
Average precipitation0.12 in
Chance of precipitation27%
Record high76° (2023)
Record low31° (1976)
Wed, 2854° / 43°0.17
54 °
Riverton, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high54°
Average low43°
Average precipitation0.17 in
Chance of precipitation35%
Record high78° (2023)
Record low32° (1976)
Thu, 2952° / 41°0.11
52 °
Riverton, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high52°
Average low41°
Average precipitation0.11 in
Chance of precipitation32%
Record high67° (1971)
Record low31° (1965)
Fri, 3051° / 41°0.17
51 °
Riverton, Friday, 30 October
Climate normal for this date — 60-year average.
Average high51°
Average low41°
Average precipitation0.17 in
Chance of precipitation27%
Record high64° (1989)
Record low32° (2020)
Sat, 3152° / 42°0.12
52 °
Riverton, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high52°
Average low42°
Average precipitation0.12 in
Chance of precipitation23%
Record high76° (2024)
Record low29° (2020)
Sun, 0153° / 43°0.11
53 °
Riverton, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high53°
Average low43°
Average precipitation0.11 in
Chance of precipitation25%
Record high73° (2024)
Record low31° (2023)
Mon, 0252° / 42°0.17
52 °
Riverton, Monday, 2 November
Climate normal for this date — 60-year average.
Average high52°
Average low42°
Average precipitation0.17 in
Chance of precipitation32%
Record high64° (1971)
Record low26° (2002)
Tue, 0352° / 41°0.22
52 °
Riverton, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high52°
Average low41°
Average precipitation0.22 in
Chance of precipitation37%
Record high68° (2017)
Record low26° (2002)
Wed, 0451° / 41°0.07
51 °
Riverton, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high51°
Average low41°
Average precipitation0.07 in
Chance of precipitation25%
Record high66° (1990)
Record low28° (2020)
Thu, 0551° / 41°0.18
51 °
Riverton, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high51°
Average low41°
Average precipitation0.18 in
Chance of precipitation33%
Record high72° (2022)
Record low28° (1965)
Fri, 0651° / 42°0.14
51 °
Riverton, Friday, 6 November
Climate normal for this date — 60-year average.
Average high51°
Average low42°
Average precipitation0.14 in
Chance of precipitation40%
Record high77° (2024)
Record low30° (2021)
Sat, 0751° / 40°0.06
51 °
Riverton, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high51°
Average low40°
Average precipitation0.06 in
Chance of precipitation20%
Record high71° (2022)
Record low25° (2002)
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 Riverton, ME 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 Riverton, ME 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.