Monthly outlook for Riverton, WY: average high 57°, average low 41.1°. That is 0° below the climate normal for October. Precipitation is expected on 5 days (about 0.8 inches), against a normal of 3 days and 0.6 inches. The warmest day looks like 18 October (68.5°), the coolest 17 October (30.8°).
57°/41.1°
Average high / low
−0°
Below normal
5 / 3
Wet days / normal
0.8 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
11 October – 20 October
56.6°
58°
-0.8°
21 October – 30 October
57.6°
53.6°
+2.2°
31 October – 9 November
at normal
47.4°
—
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).
Mon, 1246° / 38°0.22
46 °
Riverton, Monday, 12 October
Rain. High 46°, low 38°.
Pressure29.94 inHg
Wind4.4 mph N
Humidity70%
Visibility6.2 mi
Dew point35°
Tue, 1351° / 40°0.13
51 °
Riverton, Tuesday, 13 October
Rain. High 51°, low 40°.
Pressure29.97 inHg
Wind6.6 mph N
Humidity74%
Visibility6.2 mi
Dew point40°
Wed, 1450° / 41°0.24
50 °
Riverton, Wednesday, 14 October
Rain. High 50°, low 41°.
Pressure30.12 inHg
Wind5.5 mph NW
Humidity81%
Visibility5.3 mi
Dew point40°
Thu, 1554° / 43°0.08
54 °
Riverton, Thursday, 15 October
Light rain. High 54°, low 43°.
Pressure30.56 inHg
Wind13.2 mph N
Humidity52%
Visibility6.2 mi
Dew point35°
Fri, 1653° / 32°0
53 °
Riverton, Friday, 16 October
Clear. High 53°, low 32°.
Pressure30.62 inHg
Wind3.5 mph NE
Humidity59%
Visibility—
Dew point31°
Sat, 1766° / 31°0
66 °
Riverton, Saturday, 17 October
Clear. High 66°, low 31°.
Pressure30.06 inHg
Wind6.7 mph W
Humidity42%
Visibility—
Dew point30°
Sun, 1869° / 50°0
69 °
Riverton, Sunday, 18 October
Clear. High 69°, low 50°.
Pressure29.97 inHg
Wind5.9 mph SW
Humidity20%
Visibility—
Dew point20°
Mon, 1967° / 49°0
67 °
Riverton, Monday, 19 October
Clear. High 67°, low 49°.
Pressure29.88 inHg
Wind13.1 mph S
Humidity26%
Visibility—
Dew point25°
Tue, 2058° / 46°0
58 °
Riverton, Tuesday, 20 October
Overcast. High 58°, low 46°.
Pressure29.71 inHg
Wind24.6 mph W
Humidity21%
Visibility—
Dew point14°
Wed, 2151° / 39°0
51 °
Riverton, Wednesday, 21 October
Mostly clear. High 51°, low 39°.
Pressure29.97 inHg
Wind20.6 mph NW
Humidity27%
Visibility—
Dew point15°
Thu, 2260° / 36°0
60 °
Riverton, Thursday, 22 October
Clear. High 60°, low 36°.
Pressure30.18 inHg
Wind10.7 mph W
Humidity22%
Visibility—
Dew point13°
Fri, 2363° / 41°0
63 °
Riverton, Friday, 23 October
Clear. High 63°, low 41°.
Pressure29.97 inHg
Wind5.7 mph S
Humidity28%
Visibility—
Dew point21°
Sat, 2464° / 48°0
64 °
Riverton, Saturday, 24 October
Overcast. High 64°, low 48°.
Pressure29.62 inHg
Wind12.1 mph NW
Humidity22%
Visibility—
Dew point19°
Sun, 2552° / 40°0
52 °
Riverton, Sunday, 25 October
Clear. High 52°, low 40°.
Pressure29.94 inHg
Wind9 mph NE
Humidity54%
Visibility—
Dew point31°
Mon, 2655° / 38°0
55 °
Riverton, Monday, 26 October
Clear. High 55°, low 38°.
Pressure30.03 inHg
Wind5.2 mph NE
Humidity44%
Visibility—
Dew point28°
From day 17 onward the outlook is built from 60-year climate statistics
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)
Sat, 0747° / 27°0.02
47 °
Riverton, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high47°
Average low27°
Average precipitation0.02 in
Chance of precipitation12%
Record high66° (1999)
Record low-3° (2003)
Sun, 0847° / 26°0.04
47 °
Riverton, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high47°
Average low26°
Average precipitation0.04 in
Chance of precipitation15%
Record high65° (1999)
Record low1° (2003)
Mon, 0945° / 25°0.04
45 °
Riverton, Monday, 9 November
Climate normal for this date — 60-year average.
Average high45°
Average low25°
Average precipitation0.04 in
Chance of precipitation25%
Record high64° (2016)
Record low3° (1986)
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.