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Big Piney, WY Weather
Big Piney, Wyoming sits at 42.5402, -110.1193. Its warmest month is July, when the day usually reaches 83F, and its coldest is January, when the night usually falls to -2F. May is the wettest, with rain on about 8 days. The hottest day in the station record is 103F on August 9, 1998, and the coldest night -39F on January 6, 2017. This page carries live conditions, an hour by hour timeline, a ten day outlook, radar, monthly averages and searchable daily history back to 1940.
About Big Piney weather
Big Piney sits at 42.5402, -110.1193 and covers about 0.508 square miles. The forecast above is live: current conditions lead with the HRRR model, corrected against the nearest reporting station and against radar overhead, because a model can lag a storm and the radar cannot.
The tabs at the top of this page carry the hour by hour timeline, the ten day outlook and live radar. Where the models disagree about a day, the rock says so on the day rather than quietly picking a winner.
The rock grades itself against what actually happened and publishes the result whether it flatters it or not. Those standings live in the Receipts.
Where these numbers come from
Current conditions and forecast: NOAA forecast grids (the National Weather Service digital forecast, the National Blend of Models, HRRR and GFS) decoded on our own server, corrected against the nearest reporting station and our own radar. Open-Meteo is consulted only as a fallback when our server is silent.
Radar: NOAA MRMS merged reflectivity, rendered into tiles by myweatherrock.
Monthly averages and records: computed by myweatherrock from NOAA GHCN-Daily station records at the nearest qualifying station, named on this page with its distance. Measurements, not estimates.
Daily history search: the town's own NOAA GHCN-Daily station file, held on our server, measurements by day. Months the station missed fall back to the Open-Meteo historical archive (reanalysis), and the page says so when it does.
What the weather is usually like in Big Piney
Big Piney is warmest in July, when the day usually reaches 83F, and coldest in January, when the night usually falls to -2F. May is the wettest month, with rain on about 8 days of it.
Usual high and low, by month
Days with rain, by month
The same year as numbers
Month
Usual high
Usual low
Rain days
January
26F
-2F
4
February
29F
1F
4
March
40F
14F
5
April
52F
22F
6
May
62F
30F
8
June
73F
37F
6
July
83F
44F
6
August
81F
42F
6
September
70F
33F
6
October
55F
23F
5
November
40F
11F
4
December
27F
-1F
3
Thirty-year normals, 1991 to 2020, computed from the daily record, measured at the Big Piney Marbleton Ap station 2.7 miles away. A rain day means at least a hundredth of an inch fell, the same measurable-precipitation mark the Weather Service uses. Source: computed from the station record, NOAA GHCN daily.
Big Piney weather history, back to 1940
Pick any month back to 1940 and see what the archive holds for Big Piney: the reanalysis record of what happened, day by day.
Reading this month last year to start you off.
Big Piney weather records
In 29,468 days of observations Big Piney has been as hot as 103F and as cold as -39F. Not averages: the actual days.
Hottest day
103F
August 9, 1998
Coldest night
-39F
January 6, 2017
Wettest day
2.48 in
August 5, 1997
NOAA GHCN daily station records, observed 1998 to 2025: temperature at the Big Piney Marbleton Ap station, 2.7 miles away; precipitation at the Big Piney station, 0.3 miles away. Station measurements, not estimates. Record dates reflect the station's own observation schedule, and the official state record may live at a different station.
Common questions about Big Piney weather
Common questions
What is the weather usually like in Big Piney, WY?
Big Piney is warmest in July, when the day usually reaches 83F, and coldest in January, when the night usually falls to -2F. Rain falls on roughly 63 days a year, most often in May. Averages are thirty-year normals, 1991 to 2020, computed from the nearest NOAA station's own daily record.
How much does it rain in Big Piney, WY?
About 63 days a year see at least a hundredth of an inch, which is the Weather Service's measurable-precipitation mark. May is the wettest month with rain on about 8 of its days, and December the driest with about 3.
What is the hottest it has ever been in Big Piney, WY?
The hottest day measured for Big Piney reached 103F on August 9, 1998, and the coldest night -39F on January 6, 2017. Both are real NOAA station measurements from the GHCN daily archive, observed 1998 to 2025, at the Big Piney Marbleton Ap station. Not estimates, though the official state record may live at a different station.
Can I look up past weather for Big Piney, WY?
Yes, and for free. The History tab on this page takes any month back to 1940 and shows every day of it: the high, the low, what fell, and that month's hottest and coldest day. No account and no payment.
Is the Big Piney forecast on this page free, and does it track me?
It is free, carries no advertising, and needs no account. Nothing about a visitor leaves the device except the coordinates needed to fetch a forecast, and those are not stored against anyone.