Brush Creek Work Center · Photo: Magicpiano · CC BY-SA 4.0Few U.S. towns have cooler summers than Ryan Park
Deep winter brings January lows near 13°. In January, nights here are colder than in 90% of U.S. towns. Decade by decade the climate has edged up, 1.8° above 1901–2000. Seedlings are safe outdoors from about June 2, with the first autumn frost due around September 19.
A year in Ryan Park at a glance
Each month’s typical high and low, and what it brings.
What stands out about Ryan Park’s climate
Compared with towns across the U.S., with Ryan Park’s place in Wyoming beside it.
What a year in Ryan Park feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 106 frost-free days a year
In half of years the last 32° night comes by June 2 and the first by September 19. Frost dates and degree days from Centennial 1ne, WY, 19 miles away.
The 2023 USDA map puts Ryan Park’s center in zone 5a: the coldest night of a typical winter, averaged over 1991–2020, reaches about −19°. Plant labels use the zone; frost dates tell you when to plant.
Freezing nights by month
Average nights at or below 32°
About 29 inches of rain a year
April is the wettest month and July the driest.
Rain + melted snow by month
Inches of water
Heating and cooling a home in Ryan Park
Nearly all of the work is heating: a normal year has almost no cooling days. Months averaging under 55° run from September through June.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Centennial 1ne, WY.
Living with Ryan Park’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
106 frost-free days in zone 5a. The last frost comes by Jun 2 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Sep 19.
Months with highs of 62–84° and lows of 40° or more: July and August. 1.6 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Ryan Park from natural hazards, river flooding is the largest share (44%); heat waves, cold waves, winter storms and ice storms together are 10%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Ryan Park and similar climates
TownRatings has no climate map of the towns around Ryan Park yet.
Temperatures and precipitation come from NOAA’s 5 km grid; snow and day counts from the stations named on this page.
Warmer than it used to be
The last 30 years in Ryan Park averaged 1.8° warmer than the 1900s. The biggest change is in March (+4.1°).
A bigger shift than in 79% of U.S. towns.
Change by month
The two periods overlap (1991–2000 is in both), which makes the gap a little smaller than it would be between separate periods.
How Ryan Park compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Ryan Park’s place among Wyoming’s.
Ryan Park weather by month
Highs, lows and precipitation from NOAA’s grid at Ryan Park’s center. 1991–2020 normals.
| Month | High | Low | Rain + melt | 30-yr range |
|---|---|---|---|---|
| January | 30° | 13° | 2.9" | 16° – 27° |
| February | 31° | 12° | 2.6" | 17° – 28° |
| March | 39° | 18° | 2.8" | 23° – 36° |
| April | 46° | 24° | 3.6" | 29° – 40° |
| May | 56° | 32° | 3.2" | 39° – 49° |
| June | 67° | 40° | 1.6" | 48° – 58° |
| July | 74° | 46° | 1.2" | 56° – 64° |
| August | 72° | 45° | 1.3" | 54° – 63° |
| September | 64° | 38° | 1.9" | 46° – 56° |
| October | 50° | 29° | 2.5" | 33° – 45° |
| November | 37° | 19° | 2.5" | 18° – 35° |
| December | 29° | 12° | 2.6" | 15° – 24° |
| Year | 50° | 27° | 28.7" |
How much a month can swing
A normal is an average. November swings the most: from 1991 to 2020 its average ranged from 18° to 35°. August is the most reliable, staying within 9°.
Where Ryan Park’s numbers come from
Normals are 30-year averages, not a forecast. How TownRatings reads climate data →
- Temperatures and precipitation: NOAA’s gridded 1991–2020 normals for the 5 km cell at Ryan Park’s center.
- Frost dates, heating and cooling: Centennial 1ne, WY, 19 miles away.
- Growing zone: USDA Plant Hardiness Zone Map, 2023. USDA Agricultural Research Service and PRISM Group, Oregon State University, prism.oregonstate.edu/phzm, accessed 8 Oct 2026.
- Then and now: NOAA’s gridded normals for 1901–2000 at the same cell.
- Storms and extremes: FEMA National Risk Index (expected annual losses to buildings).
Common questions about Ryan Park’s climate
What is the weather like in Ryan Park?
A typical July afternoon reaches 74°, a January night drops to 13°. Colder January nights than 90% of U.S. towns; cooler July afternoons than all but 179 U.S. towns.
How cold does it get in Ryan Park in winter?
December nights average 12°. About 225 nights a year reach 32° or below and 16 reach 0° or below. In the coldest December of the last 30 years the month averaged 15°.
How hot does it get in Ryan Park?
July, with a typical high of 74°. 90° days are rare: none in a normal year at Centennial 1ne, WY.
When is the first and last frost in Ryan Park?
In half of years the last spring frost (32°) comes by June 2 and the first fall frost by September 19, about 106 frost-free days, at Centennial 1ne, WY.
What growing zone is Ryan Park in?
Zone 5a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about −19°.
What is the best time of year to visit Ryan Park?
By one simple rule (highs of 62–84° and lows of 40° or more), July and August. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Ryan Park getting warmer?
Yes: 1991–2020 averaged 1.8° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 79% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Ryan Park.
Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000; USDA/PRISM 2023 hardiness zones; FEMA National Risk Index. Today’s forecast: National Weather Service.