Finch Memorial Library · Photo: Ammodramus · CC0January in Arnold bites harder than in 89% of U.S. towns
Midsummer highs settle at about 87°. Its yearly precipitation falls short of 88% of U.S. towns. Compared with 1901–2000, the average now sits 0.9° higher. Picnics, hikes and garden evenings suit May, June and September, with highs of 71–82°.
A year in Arnold at a glance
Each month’s typical high and low, and what it brings.
What stands out about Arnold’s climate
Compared with towns across the U.S., with Arnold’s place in Nebraska beside it.
What a year in Arnold feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 149 frost-free days a year
In half of years the last 32° night comes by May 5 and the first by October 3. Frost and day counts come from NOAA’s station at Arnold 4 Wnw, NE, 4 miles from the town’s center, 170 ft higher.
The 2023 USDA map puts Arnold’s center in zone 5a: the coldest night of a typical winter, averaged over 1991–2020, reaches about −15°. 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 31 inches of snow a winter
Snow, measured at Arnold 4 Wnw, NE, falls mostly in February. Precipitation (rain plus melted snow) adds up to 23 inches a year; June is the wettest month and January the driest. Rain or snow falls on about 66 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Arnold
91% of the work is heating, so the furnace matters far more than the air conditioner. Months averaging under 55° run from October through April.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Arnold 4 Wnw, NE.
Living with Arnold’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
149 frost-free days in zone 5a. The last frost comes by May 5 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Oct 3.
Months with highs of 62–84° and lows of 40° or more: May, June and September. 0.1 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Arnold from natural hazards, river flooding is the largest share (51%); heat waves, cold waves, winter storms and ice storms together are 7%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Arnold and similar climates
TownRatings has no climate map of the towns around Arnold yet.
Climates most like Arnold’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 |
|---|---|---|---|---|
| Arnold, NE | 13° | 87° | 23" | 31" |
| Rapid City, SD | 14° | 86° | 19" | 36" |
| Sergeant Bluff, IA | 11° | 86° | 30" | 36" |
| Providence, UT | 15° | 89° | 19" | 44" |
| Lockwood, MT | 15° | 88° | 15" | 35" |
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 Arnold averaged 0.9° warmer than the 1900s. The biggest change is in January (+3.1°).
A smaller shift than in 85% 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 Arnold compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Arnold’s place among Nebraska’s.
Arnold weather by month
Highs, lows and precipitation from NOAA’s grid at Arnold’s center; snow, wet days and snow on the ground from Arnold 4 Wnw, NE. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | 30-yr range |
|---|---|---|---|---|---|---|
| January | 38° | 13° | 0.4" | 5.4" | 3 | 17° – 38° |
| February | 41° | 16° | 0.6" | 7.2" | 4 | 17° – 37° |
| March | 53° | 25° | 1.2" | 4.2" | 5 | 30° – 50° |
| April | 62° | 34° | 2.5" | 2.7" | 7 | 41° – 53° |
| May | 71° | 44° | 3.8" | 0.4" | 9 | 52° – 63° |
| June | 82° | 55° | 3.9" | 0.0" | 9 | 64° – 75° |
| July | 87° | 60° | 3.3" | 0.0" | 8 | 68° – 79° |
| August | 85° | 58° | 2.6" | 0.0" | 6 | 66° – 77° |
| September | 78° | 49° | 2.0" | 0.0" | 5 | 57° – 69° |
| October | 64° | 35° | 1.9" | 1.2" | 5 | 41° – 55° |
| November | 50° | 23° | 0.7" | 3.6" | 3 | 27° – 44° |
| December | 40° | 15° | 0.5" | 6.1" | 3 | 18° – 33° |
| Year | 63° | 36° | 23.3" | 30.8" | 66 |
How much a month can swing
A normal is an average. January swings the most: from 1991 to 2020 its average ranged from 17° to 38°. June is the most reliable, staying within 10°.
Where Arnold’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 Arnold’s center.
- Snow: Arnold 4 Wnw, NE.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Arnold 4 Wnw, NE, 4 miles from the town’s center, 170 ft higher; 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 Arnold’s climate
What is the weather like in Arnold?
A typical July afternoon reaches 87°, a January night drops to 13°, and about 31 inches of snow falls in a normal winter. Colder January nights than 89% of U.S. towns; hotter July afternoons than 63% of U.S. towns.
How cold does it get in Arnold in winter?
January nights average 13°. About 171 nights a year reach 32° or below and 14 reach 0° or below. In the coldest January of the last 30 years the month averaged 17°.
How much snow does Arnold get?
About 31 inches in a normal winter at Arnold 4 Wnw, NE, most of it in February.
How hot does it get in Arnold?
July, with a typical high of 87° and a low of 60°. About 29 days a year reach 90° and 2 reach 100° (Arnold 4 Wnw, NE).
When is the first and last frost in Arnold?
In half of years the last spring frost (32°) comes by May 5 and the first fall frost by October 3, about 149 frost-free days, at Arnold 4 Wnw, NE.
What growing zone is Arnold in?
Zone 5a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about −15°.
What is the best time of year to visit Arnold?
By one simple rule (highs of 62–84° and lows of 40° or more), May, June and September. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Arnold getting warmer?
Yes: 1991–2020 averaged 0.9° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 85% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Arnold.
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.