Monthly outlook for Neptune, IA: average high 61.7°, average low 47.8°. That is 2.8° above the climate normal for October. Precipitation is expected on 5 days (about 1.0 inches), against a normal of 4 days and 1.1 inches. The warmest day looks like 23 October (72.2°), the coolest 2 November (31.7°).
61.7°/47.8°
Average high / low
+2.8°
Above normal
5 / 4
Wet days / normal
1.0 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
18 October – 27 October
65.9°
58.4°
+4.1°
28 October – 6 November
54.7°
52.9°
+1°
7 November – 16 November
at normal
47.3°
—
October records over 66 years
88.9°3 October 2025All-time high
16.5°27 October 2020All-time low
Climate normals and records are computed from the nearest reference point — Kingsley (11 mi).
Mon, 1965° / 45°0
65 °
Neptune, Monday, 19 October
Overcast. High 65°, low 45°.
Pressure30.27 inHg
Wind5.9 mph SE
Humidity68%
Visibility6.2 mi
Dew point47°
Tue, 2066° / 46°0
66 °
Neptune, Tuesday, 20 October
Partly cloudy. High 66°, low 46°.
Pressure30.27 inHg
Wind10 mph S
Humidity61%
Visibility6.2 mi
Dew point47°
Wed, 2170° / 50°0
70 °
Neptune, Wednesday, 21 October
Clear. High 70°, low 50°.
Pressure30.21 inHg
Wind6.2 mph S
Humidity65%
Visibility6.2 mi
Dew point52°
Thu, 2271° / 53°0
71 °
Neptune, Thursday, 22 October
Mostly clear. High 71°, low 53°.
Pressure30.21 inHg
Wind10 mph S
Humidity62%
Visibility6.2 mi
Dew point52°
Fri, 2372° / 59°0
72 °
Neptune, Friday, 23 October
Overcast. High 72°, low 59°.
Pressure29.97 inHg
Wind20.4 mph S
Humidity52%
Visibility—
Dew point49°
Sat, 2464° / 53°0.01
64 °
Neptune, Saturday, 24 October
Light rain. High 64°, low 53°.
Pressure30.15 inHg
Wind16.4 mph S
Humidity56%
Visibility—
Dew point44°
Sun, 2557° / 45°0
57 °
Neptune, Sunday, 25 October
Overcast. High 57°, low 45°.
Pressure30.42 inHg
Wind7.9 mph SE
Humidity37%
Visibility—
Dew point29°
Mon, 2666° / 50°0.18
66 °
Neptune, Monday, 26 October
Light rain. High 66°, low 50°.
Pressure30.18 inHg
Wind13.5 mph SE
Humidity61%
Visibility—
Dew point45°
Tue, 2759° / 54°0.2
59 °
Neptune, Tuesday, 27 October
Light rain. High 59°, low 54°.
Pressure30.21 inHg
Wind10.8 mph SE
Humidity87%
Visibility—
Dew point51°
Wed, 2863° / 55°0.1
63 °
Neptune, Wednesday, 28 October
Light rain. High 63°, low 55°.
Pressure30.03 inHg
Wind12.9 mph S
Humidity88%
Visibility—
Dew point57°
Thu, 2959° / 57°0.04
59 °
Neptune, Thursday, 29 October
Light rain. High 59°, low 57°.
Pressure29.80 inHg
Wind13.9 mph S
Humidity86%
Visibility—
Dew point54°
Fri, 3056° / 44°0
56 °
Neptune, Friday, 30 October
Clear. High 56°, low 44°.
Pressure30.06 inHg
Wind12.1 mph NW
Humidity51%
Visibility—
Dew point34°
Sat, 3159° / 43°0.02
59 °
Neptune, Saturday, 31 October
Light rain. High 59°, low 43°.
Pressure30.09 inHg
Wind8.5 mph S
Humidity50%
Visibility—
Dew point37°
Sun, 0150° / 38°0.49
50 °
Neptune, Sunday, 1 November
Rain. High 50°, low 38°.
Pressure29.91 inHg
Wind21 mph N
Humidity90%
Visibility—
Dew point47°
Mon, 0241° / 32°0
41 °
Neptune, Monday, 2 November
Partly cloudy. High 41°, low 32°.
Pressure30.45 inHg
Wind19.8 mph N
Humidity49%
Visibility—
Dew point20°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 0352° / 36°0.06
52 °
Neptune, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high52°
Average low36°
Average precipitation0.06 in
Chance of precipitation18%
Record high74° (2022)
Record low1° (1991)
Wed, 0451° / 35°0.01
51 °
Neptune, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high51°
Average low35°
Average precipitation0.01 in
Chance of precipitation13%
Record high71° (1975)
Record low-14° (1991)
Thu, 0551° / 35°0.05
51 °
Neptune, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high51°
Average low35°
Average precipitation0.05 in
Chance of precipitation20%
Record high72° (2008)
Record low14° (1991)
Fri, 0651° / 35°0.03
51 °
Neptune, Friday, 6 November
Climate normal for this date — 60-year average.
Average high51°
Average low35°
Average precipitation0.03 in
Chance of precipitation10%
Record high71° (2020)
Record low7° (1991)
Sat, 0751° / 34°0.02
51 °
Neptune, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high51°
Average low34°
Average precipitation0.02 in
Chance of precipitation10%
Record high73° (2001)
Record low-11° (1991)
Sun, 0851° / 34°0.05
51 °
Neptune, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high51°
Average low34°
Average precipitation0.05 in
Chance of precipitation18%
Record high78° (1999)
Record low-5° (1991)
Mon, 0949° / 34°0.15
49 °
Neptune, Monday, 9 November
Climate normal for this date — 60-year average.
Average high49°
Average low34°
Average precipitation0.15 in
Chance of precipitation28%
Record high73° (1999)
Record low15° (2018)
Tue, 1046° / 31°0.08
46 °
Neptune, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high46°
Average low31°
Average precipitation0.08 in
Chance of precipitation27%
Record high72° (2012)
Record low11° (2018)
Wed, 1145° / 29°0.07
45 °
Neptune, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high45°
Average low29°
Average precipitation0.07 in
Chance of precipitation17%
Record high67° (1964)
Record low4° (1986)
Thu, 1244° / 29°0.05
44 °
Neptune, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high44°
Average low29°
Average precipitation0.05 in
Chance of precipitation22%
Record high67° (1999)
Record low6° (2019)
Fri, 1346° / 30°0.04
46 °
Neptune, Friday, 13 November
Climate normal for this date — 60-year average.
Average high46°
Average low30°
Average precipitation0.04 in
Chance of precipitation22%
Record high73° (1999)
Record low3° (1986)
Sat, 1446° / 31°0.02
46 °
Neptune, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high46°
Average low31°
Average precipitation0.02 in
Chance of precipitation17%
Record high70° (2025)
Record low8° (2014)
Sun, 1547° / 30°0.06
47 °
Neptune, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high47°
Average low30°
Average precipitation0.06 in
Chance of precipitation20%
Record high70° (2001)
Record low4° (2000)
Mon, 1647° / 30°0.08
47 °
Neptune, Monday, 16 November
Climate normal for this date — 60-year average.
Average high47°
Average low30°
Average precipitation0.08 in
Chance of precipitation17%
Record high71° (2001)
Record low4° (2014)
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 Neptune, IA 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 Neptune, IA 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.