Oneill, MT
Historical community (former settlement) in Custer County, Montana
Oneill is a historical community (former settlement) in Custer County, Montana. It is 29.7 miles NE of Ismay, the nearest town.
Oneill at a glance
- State
- Montana
- County
- Custer County
- Nearest town
- Ismay (29.7 mi)
- Time zone
- America/Denver
- Coordinates
- 46.1486, -105.1500
Weather in Oneill now
Loading the National Weather Service forecast…
Oneill weather by the hour
Oneill weather for the next 7 days
Source: National Weather Service (NOAA) · forecast for the coordinates of Oneill.
This week in Oneill
Sunrise, sunset and moon in Oneill
What is the weather usually like in Oneill?
Köppen climate classification, calculated from the 1991–2020 normals
- Julywarmest month · 91°F average high
- Januarycoldest month · 6°F average low
- 14.5 inprecipitation per year · 369 mm
- 29.9 insnowfall per year · 76 cm
Average high and low temperature (°F)
Average precipitation (inches)
Best time to visit Oneill: May–June and August–September, with mild temperatures and fewer rainy days.
Source: NOAA NCEI U.S. Climate Normals 1991–2020, station MIZPAH 4 NNW, MT US (USC00245754), adjusted for the elevation of Oneill.
Oneill weather month by month
Sunrise and sunset in Oneill through the year
| Month | Sunrise | Sunset | Daylight |
|---|---|---|---|
| January | 7:36 AM | 4:43 PM | 9 h 6 min |
| February | 7:01 AM | 5:28 PM | 10 h 26 min |
| March | 7:10 AM | 7:07 PM | 11 h 56 min |
| April | 6:11 AM | 7:49 PM | 13 h 37 min |
| May | 5:25 AM | 8:28 PM | 15 h 2 min |
| June | 5:06 AM | 8:55 PM | 15 h 48 min |
| July | 5:22 AM | 8:50 PM | 15 h 27 min |
| August | 5:58 AM | 8:11 PM | 14 h 12 min |
| September | 6:37 AM | 7:13 PM | 12 h 36 min |
| October | 7:16 AM | 6:16 PM | 10 h 59 min |
| November | 7:00 AM | 4:30 PM | 9 h 29 min |
| December | 7:34 AM | 4:17 PM | 8 h 42 min |
Times for the 15th of each month, local time (America/Denver).
What is the weather like in Oneill?
Oneill has a cold semi-arid climate. The warmest month is July, with an average high of 91°F (33°C), and the coldest is January, with average lows of 6°F (-14°C).
It gets about 14.5 inches (369 mm) of precipitation a year. The wettest month is May and the driest is December. Snow is common: about 30 inches fall in an average year.
The best time to visit Oneill is May–June and August–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 Oneill
The closest live webcam is Marmarth, 58.0 miles E of Oneill.
Webcams: Windy.com. Distances in a straight line from Oneill.
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Map of Oneill, MT
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Oneill Street View
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Questions about Oneill
Where is Oneill, MT?
Oneill is a historical community (former settlement) in Custer County, Montana, 29.7 miles NE of Ismay.
What county is Oneill in?
Oneill is in Custer County, Montana.
What is the nearest town to Oneill?
Ismay, 29.7 miles away.
Are there webcams near Oneill?
Yes. The closest is Marmarth, 58.0 miles away.
What is the hottest month in Oneill?
July, with an average high of 91°F (33°C).
What is the coldest month in Oneill?
January, with an average low of 6°F (-14°C).
How much does it rain in Oneill?
About 14.5 inches (369 mm) a year; the wettest month is May.
Does it snow in Oneill?
Yes, about 30 inches of snow fall in an average year.
When is the best time to visit Oneill?
May–June and August–September, when temperatures are most pleasant and rainy days are fewer.
What climate does Oneill have?
Cold semi-arid (Köppen BSk).
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