Monthly outlook for Riverside, ID: average high 58.1°, average low 38.8°. That is 0.5° below the climate normal for October. Precipitation is expected on 3 days (about 1.5 inches), against a normal of 3 days and 0.5 inches. The warmest day looks like 18 October (69.5°), the coolest 21 October (32.1°).
58.1°/38.8°
Average high / low
−0.5°
Below normal
3 / 3
Wet days / normal
1.5 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
11 October – 20 October
59.2°
60.3°
-0.6°
21 October – 30 October
56.2°
55°
+0.7°
31 October – 9 November
at normal
49.3°
—
October records over 66 years
86.9°2 October 2010All-time high
7.3°30 October 2019All-time low
Climate normals and records are computed from the nearest reference point — Olsen (11 mi).
Mon, 1249° / 39°0.36
49 °
Riverside, Monday, 12 October
Rain. High 49°, low 39°.
Pressure29.91 inHg
Wind6.1 mph SW
Humidity87%
Visibility6.2 mi
Dew point38°
Tue, 1348° / 36°0.06
48 °
Riverside, Tuesday, 13 October
Light rain. High 48°, low 36°.
Pressure30.12 inHg
Wind6 mph SW
Humidity80%
Visibility6.2 mi
Dew point36°
Wed, 1455° / 33°0
55 °
Riverside, Wednesday, 14 October
Clear. High 55°, low 33°.
Pressure30.18 inHg
Wind0.9 mph S
Humidity65%
Visibility6.2 mi
Dew point37°
Thu, 1563° / 36°0
63 °
Riverside, Thursday, 15 October
Clear. High 63°, low 36°.
Pressure30.45 inHg
Wind12.7 mph NE
Humidity46%
Visibility6.2 mi
Dew point36°
Fri, 1663° / 41°0
63 °
Riverside, Friday, 16 October
Clear. High 63°, low 41°.
Pressure30.45 inHg
Wind11 mph NE
Humidity42%
Visibility—
Dew point32°
Sat, 1768° / 38°0
68 °
Riverside, Saturday, 17 October
Clear. High 68°, low 38°.
Pressure30.15 inHg
Wind8.3 mph W
Humidity43%
Visibility—
Dew point33°
Sun, 1870° / 47°0
70 °
Riverside, Sunday, 18 October
Overcast. High 70°, low 47°.
Pressure30.03 inHg
Wind8.7 mph SW
Humidity34%
Visibility—
Dew point31°
Mon, 1969° / 47°0
69 °
Riverside, Monday, 19 October
Overcast. High 69°, low 47°.
Pressure29.83 inHg
Wind14.8 mph S
Humidity29%
Visibility—
Dew point29°
Tue, 2052° / 39°0.01
52 °
Riverside, Tuesday, 20 October
Light rain. High 52°, low 39°.
Pressure29.97 inHg
Wind23.7 mph SW
Humidity63%
Visibility—
Dew point31°
Wed, 2148° / 32°0
48 °
Riverside, Wednesday, 21 October
Partly cloudy. High 48°, low 32°.
Pressure30.24 inHg
Wind17.4 mph SW
Humidity49%
Visibility—
Dew point23°
Thu, 2255° / 34°0
55 °
Riverside, Thursday, 22 October
Clear. High 55°, low 34°.
Pressure30.39 inHg
Wind9.4 mph SW
Humidity39%
Visibility—
Dew point22°
Fri, 2365° / 38°0
65 °
Riverside, Friday, 23 October
Clear. High 65°, low 38°.
Pressure30.00 inHg
Wind6.7 mph NE
Humidity32%
Visibility—
Dew point23°
Sat, 2460° / 44°0
60 °
Riverside, Saturday, 24 October
Partly cloudy. High 60°, low 44°.
Pressure29.74 inHg
Wind21.5 mph SW
Humidity29%
Visibility—
Dew point23°
Sun, 2551° / 34°0
51 °
Riverside, Sunday, 25 October
Clear. High 51°, low 34°.
Pressure30.03 inHg
Wind9.5 mph S
Humidity36%
Visibility—
Dew point19°
Mon, 2657° / 37°0
57 °
Riverside, Monday, 26 October
Clear. High 57°, low 37°.
Pressure30.09 inHg
Wind5.6 mph NE
Humidity36%
Visibility—
Dew point23°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2755° / 33°0.02
55 °
Riverside, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high55°
Average low33°
Average precipitation0.02 in
Chance of precipitation15%
Record high71° (1977)
Record low19° (1970)
Wed, 2853° / 33°0.04
53 °
Riverside, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high53°
Average low33°
Average precipitation0.04 in
Chance of precipitation25%
Record high70° (1990)
Record low15° (2019)
Thu, 2952° / 33°0.04
52 °
Riverside, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high52°
Average low33°
Average precipitation0.04 in
Chance of precipitation18%
Record high69° (1962)
Record low12° (2019)
Fri, 3051° / 31°0.04
51 °
Riverside, Friday, 30 October
Climate normal for this date — 60-year average.
Average high51°
Average low31°
Average precipitation0.04 in
Chance of precipitation23%
Record high70° (1962)
Record low7° (2019)
Sat, 3151° / 32°0.02
51 °
Riverside, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high51°
Average low32°
Average precipitation0.02 in
Chance of precipitation15%
Record high70° (2014)
Record low13° (2019)
Sun, 0150° / 32°0.02
50 °
Riverside, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high50°
Average low32°
Average precipitation0.02 in
Chance of precipitation15%
Record high68° (1988)
Record low14° (2019)
Mon, 0250° / 31°0.04
50 °
Riverside, Monday, 2 November
Climate normal for this date — 60-year average.
Average high50°
Average low31°
Average precipitation0.04 in
Chance of precipitation18%
Record high66° (1965)
Record low9° (1991)
Tue, 0350° / 30°0.02
50 °
Riverside, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high50°
Average low30°
Average precipitation0.02 in
Chance of precipitation13%
Record high66° (1965)
Record low11° (1991)
Wed, 0450° / 31°0.03
50 °
Riverside, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high50°
Average low31°
Average precipitation0.03 in
Chance of precipitation15%
Record high67° (2020)
Record low17° (2002)
Thu, 0550° / 31°0.02
50 °
Riverside, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high50°
Average low31°
Average precipitation0.02 in
Chance of precipitation18%
Record high67° (2020)
Record low18° (2003)
Fri, 0650° / 31°0.04
50 °
Riverside, Friday, 6 November
Climate normal for this date — 60-year average.
Average high50°
Average low31°
Average precipitation0.04 in
Chance of precipitation20%
Record high69° (2020)
Record low18° (1971)
Sat, 0749° / 31°0.03
49 °
Riverside, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high49°
Average low31°
Average precipitation0.03 in
Chance of precipitation15%
Record high69° (1999)
Record low19° (1971)
Sun, 0847° / 30°0.05
47 °
Riverside, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high47°
Average low30°
Average precipitation0.05 in
Chance of precipitation32%
Record high63° (1965)
Record low20° (2018)
Mon, 0947° / 29°0.04
47 °
Riverside, Monday, 9 November
Climate normal for this date — 60-year average.
Average high47°
Average low29°
Average precipitation0.04 in
Chance of precipitation27%
Record high60° (2014)
Record low20° (2018)
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 Riverside, ID 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 Riverside, ID 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.