Neptune, IA
Unincorporated community in Plymouth County, Iowa
Neptune is a small unincorporated community in Plymouth County, Iowa. It is 6.3 miles NW of Merrill, the nearest town. Its ZIP code is 51024.
Neptune at a glance
- State
- Iowa
- County
- Plymouth County
- ZIP code
- 51024
- Nearest town
- Merrill (6.3 mi)
- Time zone
- America/Chicago
- Coordinates
- 42.6636, -96.1558
Weather in Neptune now
Loading the National Weather Service forecast…
Neptune weather by the hour
Neptune weather for the next 7 days
Source: National Weather Service (NOAA) · forecast for the coordinates of Neptune.
This week in Neptune
Sunrise, sunset and moon in Neptune
What is the weather usually like in Neptune?
Köppen climate classification, calculated from the 1991–2020 normals
- Julywarmest month · 85°F average high
- Januarycoldest month · 7°F average low
- 30.0 inprecipitation per year · 762 mm
- 30.9 insnowfall per year · 78 cm
Average high and low temperature (°F)
Average precipitation (inches)
Best time to visit Neptune: June to September, with mild temperatures and fewer rainy days.
Source: NOAA NCEI U.S. Climate Normals 1991–2020, station LE MARS, IA US (USC00134735), adjusted for the elevation of Neptune.
Neptune weather month by month
Sunrise and sunset in Neptune through the year
| Month | Sunrise | Sunset | Daylight |
|---|---|---|---|
| January | 7:50 AM | 5:18 PM | 9 h 27 min |
| February | 7:19 AM | 5:57 PM | 10 h 38 min |
| March | 7:34 AM | 7:32 PM | 11 h 57 min |
| April | 6:41 AM | 8:08 PM | 13 h 26 min |
| May | 6:00 AM | 8:41 PM | 14 h 41 min |
| June | 5:44 AM | 9:06 PM | 15 h 21 min |
| July | 5:58 AM | 9:02 PM | 15 h 3 min |
| August | 6:30 AM | 8:27 PM | 13 h 57 min |
| September | 7:03 AM | 7:36 PM | 12 h 32 min |
| October | 7:36 AM | 6:43 PM | 11 h 7 min |
| November | 7:14 AM | 5:03 PM | 9 h 48 min |
| December | 7:46 AM | 4:53 PM | 9 h 7 min |
Times for the 15th of each month, local time (America/Chicago).
What is the weather like in Neptune?
Neptune has a hot-summer humid continental climate. The warmest month is July, with an average high of 85°F (29°C), and the coldest is January, with average lows of 7°F (-14°C).
It gets about 30.0 inches (762 mm) of precipitation a year. The wettest month is June and the driest is January. Snow is common: about 31 inches fall in an average year.
The best time to visit Neptune is June to September. The live forecast on this page comes from the National Weather Service and the climate averages from NOAA’s 1991–2020 U.S. Climate Normals.
Webcams near Neptune
The closest live webcam is Lawton: 3BC - US 20 @ MM 15 (IWZ 3133), 13.1 miles S of Neptune.
Webcams: Windy.com. Distances in a straight line from Neptune.
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Map of Neptune, IA
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Neptune Street View
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Questions about Neptune
Where is Neptune, IA?
Neptune is an unincorporated community in Plymouth County, Iowa, 6.3 miles NW of Merrill.
What county is Neptune in?
Neptune is in Plymouth County, Iowa.
What is the ZIP code of Neptune, IA?
The ZIP code for Neptune is 51024.
What is the nearest town to Neptune?
Merrill, 6.3 miles away.
Are there webcams near Neptune?
Yes. The closest is Lawton: 3BC - US 20 @ MM 15 (IWZ 3133), 13.1 miles away.
What is the hottest month in Neptune?
July, with an average high of 85°F (29°C).
What is the coldest month in Neptune?
January, with an average low of 7°F (-14°C).
How much does it rain in Neptune?
About 30.0 inches (762 mm) a year; the wettest month is June.
Does it snow in Neptune?
Yes, about 31 inches of snow fall in an average year.
When is the best time to visit Neptune?
June to September, when temperatures are most pleasant and rainy days are fewer.
What climate does Neptune have?
Hot-summer humid continental (Köppen Dfa).
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