Monthly outlook for Riverton, WY: average high 59.5°, average low 40.6°. That is 0.7° above the climate normal for October. Precipitation is expected on 4 days (about 1.3 inches), against a normal of 3 days and 0.6 inches. The warmest day looks like 9 October (82.1°), the coolest 16 October (30.4°).
59.5°/40.6°
Average high / low
+0.7°
Above normal
4 / 3
Wet days / normal
1.3 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 October – 17 October
59.6°
59.1°
+0.3°
18 October – 27 October
59.2°
55.7°
+2°
28 October – 6 November
at normal
48.6°
—
October records over 66 years
85.8°4 October 2024All-time high
-10.8°30 October 2019All-time low
Climate normals and records are computed from the nearest reference point — Arapahoe (4 mi).
Fri, 0982° / 45°0
82 °
Riverton, Friday, 9 October
Clear. High 82°, low 45°.
Pressure29.77 inHg
Wind3.6 mph NE
Humidity24%
Visibility6.2 mi
Dew point27°
Sat, 1077° / 50°0
77 °
Riverton, Saturday, 10 October
Mostly clear. High 77°, low 50°.
Pressure29.50 inHg
Wind7.7 mph S
Humidity20%
Visibility6.2 mi
Dew point31°
Sun, 1158° / 44°0.39
58 °
Riverton, Sunday, 11 October
Rain. High 58°, low 44°.
Pressure29.74 inHg
Wind10.2 mph N
Humidity57%
Visibility6.2 mi
Dew point39°
Mon, 1250° / 38°0.2
50 °
Riverton, Monday, 12 October
Rain. High 50°, low 38°.
Pressure29.88 inHg
Wind13.6 mph N
Humidity68%
Visibility6.2 mi
Dew point37°
Tue, 1354° / 39°0.02
54 °
Riverton, Tuesday, 13 October
Light rain. High 54°, low 39°.
Pressure30.00 inHg
Wind7.7 mph N
Humidity74%
Visibility—
Dew point39°
Wed, 1452° / 45°0.31
52 °
Riverton, Wednesday, 14 October
Rain. High 52°, low 45°.
Pressure29.80 inHg
Wind9.5 mph SE
Humidity72%
Visibility—
Dew point42°
Thu, 1550° / 36°0.35
50 °
Riverton, Thursday, 15 October
Snow. High 50°, low 36°.
Pressure30.18 inHg
Wind19.8 mph N
Humidity87%
Visibility—
Dew point36°
Fri, 1642° / 30°0
42 °
Riverton, Friday, 16 October
Clear. High 42°, low 30°.
Pressure30.62 inHg
Wind14.6 mph N
Humidity45%
Visibility—
Dew point17°
Sat, 1752° / 31°0
52 °
Riverton, Saturday, 17 October
Clear. High 52°, low 31°.
Pressure30.33 inHg
Wind4.2 mph S
Humidity32%
Visibility—
Dew point15°
Sun, 1853° / 37°0
53 °
Riverton, Sunday, 18 October
Partly cloudy. High 53°, low 37°.
Pressure30.33 inHg
Wind6.9 mph SE
Humidity34%
Visibility—
Dew point21°
Mon, 1957° / 38°0
57 °
Riverton, Monday, 19 October
Clear. High 57°, low 38°.
Pressure30.12 inHg
Wind3.5 mph SE
Humidity33%
Visibility—
Dew point21°
Tue, 2059° / 43°0
59 °
Riverton, Tuesday, 20 October
Clear. High 59°, low 43°.
Pressure30.09 inHg
Wind5.2 mph SW
Humidity30%
Visibility—
Dew point22°
Wed, 2161° / 44°0
61 °
Riverton, Wednesday, 21 October
Partly cloudy. High 61°, low 44°.
Pressure30.06 inHg
Wind8.7 mph NE
Humidity23%
Visibility—
Dew point18°
Thu, 2258° / 41°0
58 °
Riverton, Thursday, 22 October
Clear. High 58°, low 41°.
Pressure30.30 inHg
Wind8.4 mph E
Humidity37%
Visibility—
Dew point25°
Fri, 2366° / 43°0
66 °
Riverton, Friday, 23 October
Clear. High 66°, low 43°.
Pressure30.03 inHg
Wind6.4 mph W
Humidity22%
Visibility—
Dew point18°
From day 17 onward the outlook is built from 60-year climate statistics
Sat, 2455° / 32°0.04
55 °
Riverton, Saturday, 24 October
Climate normal for this date — 60-year average.
Average high55°
Average low32°
Average precipitation0.04 in
Chance of precipitation17%
Record high72° (1992)
Record low12° (1975)
Sun, 2555° / 31°0.02
55 °
Riverton, Sunday, 25 October
Climate normal for this date — 60-year average.
Average high55°
Average low31°
Average precipitation0.02 in
Chance of precipitation12%
Record high74° (2014)
Record low4° (1975)
Mon, 2653° / 31°0.04
53 °
Riverton, Monday, 26 October
Climate normal for this date — 60-year average.
Average high53°
Average low31°
Average precipitation0.04 in
Chance of precipitation23%
Record high71° (1977)
Record low-1° (2020)
Tue, 2753° / 29°0.03
53 °
Riverton, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high53°
Average low29°
Average precipitation0.03 in
Chance of precipitation12%
Record high72° (2024)
Record low8° (1976)
Wed, 2853° / 29°0.05
53 °
Riverton, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high53°
Average low29°
Average precipitation0.05 in
Chance of precipitation15%
Record high70° (1968)
Record low5° (2019)
Thu, 2950° / 29°0.06
50 °
Riverton, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high50°
Average low29°
Average precipitation0.06 in
Chance of precipitation27%
Record high71° (1968)
Record low4° (2019)
Fri, 3048° / 27°0.05
48 °
Riverton, Friday, 30 October
Climate normal for this date — 60-year average.
Average high48°
Average low27°
Average precipitation0.05 in
Chance of precipitation25%
Record high69° (1962)
Record low-11° (2019)
Sat, 3148° / 27°0.03
48 °
Riverton, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high48°
Average low27°
Average precipitation0.03 in
Chance of precipitation22%
Record high68° (2014)
Record low-2° (1991)
Sun, 0148° / 26°0.02
48 °
Riverton, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high48°
Average low26°
Average precipitation0.02 in
Chance of precipitation20%
Record high69° (2014)
Record low-3° (2002)
Mon, 0247° / 25°0.05
47 °
Riverton, Monday, 2 November
Climate normal for this date — 60-year average.
Average high47°
Average low25°
Average precipitation0.05 in
Chance of precipitation15%
Record high69° (2025)
Record low-6° (1991)
Tue, 0347° / 26°0.02
47 °
Riverton, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high47°
Average low26°
Average precipitation0.02 in
Chance of precipitation7%
Record high67° (2020)
Record low-8° (1991)
Wed, 0449° / 26°0.01
49 °
Riverton, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high49°
Average low26°
Average precipitation0.01 in
Chance of precipitation7%
Record high67° (2020)
Record low2° (1994)
Thu, 0548° / 26°0.03
48 °
Riverton, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high48°
Average low26°
Average precipitation0.03 in
Chance of precipitation17%
Record high67° (2020)
Record low-1° (1967)
Fri, 0648° / 26°0.04
48 °
Riverton, Friday, 6 November
Climate normal for this date — 60-year average.
Average high48°
Average low26°
Average precipitation0.04 in
Chance of precipitation12%
Record high69° (2020)
Record low-1° (1971)
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, WY 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, WY 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.