Newcastle reaches 100° on about 15 days a year, more than 93% of U.S. towns
The coldest hours of a January night bottom out at 28° on average. From frosty January to warm July, readings climb 66°. It is a dry place: less rain and snow fall here than on 73% of U.S. towns. From March to May and October, highs of 64–80° make it easy to spend the day outdoors.
A year in Newcastle at a glance
Each month’s typical high and low, and what it brings.
What stands out about Newcastle’s climate
Compared with towns across the U.S., with Newcastle’s place in Oklahoma beside it.
What a year in Newcastle feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 214 frost-free days a year
In half of years the last 32° night comes by April 3 and the first by November 4. Frost and day counts come from NOAA’s station at Blanchard 2 Ssw, OK, 10 miles from the town’s center, at about the same height.
The 2023 USDA map puts Newcastle’s center in zone 7b: the coldest night of a typical winter, averaged over 1991–2020, reaches about 9°. Plant labels use the zone; frost dates tell you when to plant.
Freezing nights by month
Average nights at or below 32°
90° days by month
Average days at 90° or more
About 7 inches of snow a winter
Snow, measured at Oklahoma City Will Rogers Airport, falls mostly in January, February and December. Precipitation (rain plus melted snow) adds up to 36 inches a year; May is the wettest month and January the driest. Rain or snow falls on about 83 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Newcastle
62% of the work is heating. Months averaging under 55° run from November through March.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Blanchard 2 Ssw, OK.
Living with Newcastle’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
214 frost-free days in zone 7b. The last frost comes by Apr 3 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Nov 4.
Months with highs of 62–84° and lows of 40° or more: March, April, May and October. 22 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Newcastle from natural hazards, tornadoes are the largest share (31%); heat waves, cold waves, winter storms and ice storms together are 24%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Newcastle and its neighbors
Every town next door is within a degree of Newcastle in January and July, closer than the 5 km grid can tell apart. Tap a town to see its climate.
Climates most like Newcastle’s, farther away
TownRatings’ own comparison of NOAA 1991–2020 normals, not a NOAA product: places of 5,000+ at least 150 miles away, one per state, closest on January low, July high, precipitation and snow.
| Town | Jan. low | July high | Precip. | Snow |
|---|---|---|---|---|
| Newcastle, OK | 28° | 94° | 36" | 6.7" |
| Mulvane, KS | 23° | 92° | 36" | 11" |
| McKinney, TX | 34° | 94° | 41" | 2.6" |
| Lake of the Pines, CA | 37° | 93° | 40" | 7.2" |
| Lancaster, SC | 31° | 91° | 43" | 2.6" |
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value. Snow and frost-free days come from the nearest weather station, so neighbors often share them.
Warmer than it used to be
The last 30 years in Newcastle averaged 1.0° warmer than the 1900s. The biggest change is in March (+2.4°).
A smaller shift than in 80% 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 Newcastle compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Newcastle’s place among Oklahoma’s.
Newcastle weather by month
Highs, lows and precipitation from NOAA’s grid at Newcastle’s center; snow, wet days and snow on the ground from Oklahoma City Will Rogers Airport. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 50° | 28° | 1.4" | 1.8" | 5 | 2 | 34° – 48° |
| February | 55° | 32° | 1.5" | 1.8" | 6 | 1 | 36° – 53° |
| March | 64° | 40° | 2.6" | 0.8" | 7 | 1 | 46° – 61° |
| April | 72° | 48° | 3.6" | 0.0" | 8 | 0 | 55° – 67° |
| May | 80° | 58° | 5.3" | 0.0" | 10 | 0 | 65° – 76° |
| June | 88° | 67° | 4.5" | 0.0" | 9 | 0 | 74° – 84° |
| July | 94° | 71° | 3.2" | 0.0" | 6 | 0 | 78° – 90° |
| August | 93° | 70° | 3.3" | 0.0" | 7 | 0 | 74° – 89° |
| September | 85° | 62° | 3.6" | 0.0" | 7 | 0 | 70° – 81° |
| October | 74° | 50° | 3.3" | 0.0" | 8 | 0 | 56° – 68° |
| November | 62° | 39° | 2.0" | 0.5" | 6 | 0 | 44° – 57° |
| December | 52° | 30° | 2.0" | 1.8" | 6 | 2 | 31° – 46° |
| Year | 72° | 50° | 36.3" | 6.7" | 83 | 5 |
How much a month can swing
A normal is an average. February swings the most: from 1991 to 2020 its average ranged from 36° to 53°. June is the most reliable, staying within 10°.
Where Newcastle’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 Newcastle’s center.
- Snow: Oklahoma City Will Rogers Airport.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Blanchard 2 Ssw, OK, 10 miles from the town’s center, at about the same height; the nearest station that passes our checks for distance, height and agreement with the grid.
- 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 Newcastle’s climate
What is the weather like in Newcastle?
A typical July afternoon reaches 94°, a January night drops to 28°, and about 7 inches of snow falls in a normal winter. Milder January nights than 70% of U.S. towns; hotter July afternoons than 93% of U.S. towns.
How cold does it get in Newcastle in winter?
January nights average 28°. About 72 nights a year reach 32° or below. In the coldest January of the last 30 years the month averaged 34°.
How much snow does Newcastle get?
About 6.7 inches in a normal winter at Oklahoma City Will Rogers Airport, most of it in January, February and December, with snow on the ground about 5 days a year.
How hot does it get in Newcastle?
July, with a typical high of 94° and a low of 71°. About 77 days a year reach 90° and 15 reach 100° (Blanchard 2 Ssw, OK).
When is the first and last frost in Newcastle?
In half of years the last spring frost (32°) comes by April 3 and the first fall frost by November 4, about 214 frost-free days, at Blanchard 2 Ssw, OK.
What growing zone is Newcastle in?
Zone 7b on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 9°.
What is the best time of year to visit Newcastle?
By one simple rule (highs of 62–84° and lows of 40° or more), March, April, May and October. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Newcastle getting warmer?
Yes: 1991–2020 averaged 1.0° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 80% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Newcastle.
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.