Photo: TCP04 · CC BY 4.0Neither notably warm, cold, wet nor dry, Bellflower sits near the middle of U.S. towns
January nights here settle around 20°. May is the wettest month, February the driest. Its July heat outdoes that of 64% of U.S. towns. Seedlings are safe outdoors from about April 14, with the first autumn frost due around October 23.
A year in Bellflower at a glance
Each month’s typical high and low, and what it brings.
What stands out about Bellflower’s climate
Compared with towns across the U.S., with Bellflower’s place in Missouri beside it.
What a year in Bellflower feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 191 frost-free days a year
In half of years the last 32° night comes by April 14 and the first by October 23. Frost and day counts come from NOAA’s station at Warrenton 1 N, MO, 16 miles from the town’s center, at about the same height.
The 2023 USDA map puts Bellflower’s center in zone 6b: the coldest night of a typical winter, averaged over 1991–2020, reaches about −4°. 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 42 inches of rain a year
May is the wettest month and February the driest.
Rain + melted snow by month
Inches of water
Heating and cooling a home in Bellflower
80% of the work is heating. Months averaging under 55° run from November 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 Warrenton 1 N, MO.
Living with Bellflower’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
191 frost-free days in zone 6b. The last frost comes by Apr 14 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 23.
Months with highs of 62–84° and lows of 40° or more: April, May, June, September and October.
Parks & trails →Of the yearly building losses FEMA expects in Bellflower from natural hazards, river flooding is the largest share (44%); heat waves, cold waves, winter storms and ice storms together are 28%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Bellflower and similar climates
TownRatings has no climate map of the towns around Bellflower 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 Bellflower averaged 1.0° warmer than the 1900s. The biggest change is in December (+2.2°).
A smaller shift than in 77% 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 Bellflower compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Bellflower’s place among Missouri’s.
Bellflower weather by month
Highs, lows and precipitation from NOAA’s grid at Bellflower’s center. 1991–2020 normals.
| Month | High | Low | Rain + melt | 30-yr range |
|---|---|---|---|---|
| January | 38° | 20° | 2.2" | 23° – 40° |
| February | 44° | 24° | 2.1" | 22° – 44° |
| March | 54° | 32° | 3.0" | 35° – 57° |
| April | 66° | 43° | 4.4" | 48° – 60° |
| May | 75° | 53° | 5.0" | 59° – 72° |
| June | 84° | 63° | 4.4" | 69° – 78° |
| July | 87° | 66° | 4.3" | 72° – 84° |
| August | 86° | 64° | 4.0" | 69° – 81° |
| September | 79° | 56° | 3.7" | 62° – 74° |
| October | 68° | 44° | 3.3" | 50° – 61° |
| November | 54° | 34° | 3.1" | 36° – 51° |
| December | 42° | 25° | 2.4" | 19° – 43° |
| Year | 65° | 44° | 41.9" |
How much a month can swing
A normal is an average. December swings the most: from 1991 to 2020 its average ranged from 19° to 43°. June is the most reliable, staying within 9°.
Where Bellflower’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 Bellflower’s center.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Warrenton 1 N, MO, 16 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 Bellflower’s climate
What is the weather like in Bellflower?
A typical July afternoon reaches 87°, a January night drops to 20°. Colder January nights than 59% of U.S. towns; hotter July afternoons than 64% of U.S. towns.
How cold does it get in Bellflower in winter?
January nights average 20°. About 111 nights a year reach 32° or below and 4 reach 0° or below. In the coldest January of the last 30 years the month averaged 23°.
How hot does it get in Bellflower?
July, with a typical high of 87° and a low of 66°. About 31 days a year reach 90° and 2 reach 100° (Warrenton 1 N, MO).
When is the first and last frost in Bellflower?
In half of years the last spring frost (32°) comes by April 14 and the first fall frost by October 23, about 191 frost-free days, at Warrenton 1 N, MO.
What growing zone is Bellflower in?
Zone 6b on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about −4°.
What is the best time of year to visit Bellflower?
By one simple rule (highs of 62–84° and lows of 40° or more), April, May, June, September and October. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Bellflower getting warmer?
Yes: 1991–2020 averaged 1.0° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 77% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Bellflower.
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.