Hampton, Iowa climate: Normal weather by month, frost dates and records
Hampton's normal year runs from 8°F January nights to 83°F July afternoons, with 38.1 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 8.1°C, January lows of −13°C, July highs of 29°C, 968 mm of precipitation a year.
- NOAA stationHampton
- Station IDUSC00133584
- Location42.76°N 93.20°W
- Elevation1,105 ft (337 m)
- From the center1 miles
- Population4,340
On October 23, the normal high in Hampton is 58°F and the normal low 35°F, and the chance of measurable rain or snow is 28%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Hampton.
- Jan 25° 8°
- Feb 30° 12°
- Mar 43° 24°
- Apr 58° 35°
- May 70° 48°
- Jun 80° 58°
- Jul 83° 62°
- Aug 81° 59°
- Sep 75° 50°
- Oct 62° 38°
- Nov 45° 25°
- Dec 31° 15°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like in Hampton each month?
July is the warmest month, with normal highs of 83°F; January the coldest, with normal lows of 8°F. The most precipitation falls in June (6.06 in), the least in January (0.97 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 25°F | 8°F | 16.7°F | 0.97 | 7 | <1 | 31 | 9 h 20 min |
| February | 30°F | 12°F | 21.1°F | 1.31 | 6 | <1 | 27 | 10 h 30 min |
| March | 43°F | 24°F | 33.4°F | 2.09 | 8 | <1 | 24 | 11 h 50 min |
| April | 58°F | 35°F | 46.5°F | 4.26 | 11 | <1 | 11 | 13 h 20 min |
| May | 70°F | 48°F | 58.9°F | 5.25 | 14 | 1 | 1 | 14 h 40 min |
| June | 80°F | 58°F | 69.3°F | 6.06 | 12 | 3 | <1 | 15 h 20 min |
| July | 83°F | 62°F | 72.7°F | 4.70 | 9 | 5 | <1 | 15 h |
| August | 81°F | 59°F | 70.3°F | 4.24 | 9 | 3 | <1 | 14 h |
| September | 75°F | 50°F | 62.8°F | 3.30 | 9 | 1 | 1 | 12 h 30 min |
| October | 62°F | 38°F | 49.9°F | 2.54 | 9 | <1 | 10 | 11 h 10 min |
| November | 45°F | 25°F | 35.2°F | 1.80 | 7 | <1 | 23 | 9 h 50 min |
| December | 31°F | 15°F | 22.9°F | 1.59 | 7 | <1 | 30 | 9 h |
| Year (annual) | 57°F | 36°F | 46.6°F | 38.11 | 108 | 12 | 157 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | −4°C | −13°C | −8.5°C | 25 mm |
| February | −1°C | −11°C | −6.1°C | 33 mm |
| March | 6°C | −5°C | 0.8°C | 53 mm |
| April | 15°C | 2°C | 8.1°C | 108 mm |
| May | 21°C | 9°C | 14.9°C | 133 mm |
| June | 27°C | 15°C | 20.7°C | 154 mm |
| July | 29°C | 17°C | 22.6°C | 119 mm |
| August | 27°C | 15°C | 21.3°C | 108 mm |
| September | 24°C | 10°C | 17.1°C | 84 mm |
| October | 17°C | 3°C | 9.9°C | 65 mm |
| November | 7°C | −4°C | 1.8°C | 46 mm |
| December | 0°C | −10°C | −5.1°C | 40 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Iowa Falls (17 miles away), gets 28 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00133584; annual normals. Wet days: 0.01 inch or more; 90°F days and freezing nights: NOAA's day counts. Daylight: sunrise to sunset on the 15th, computed from the latitude.
When is the best weather to visit Hampton?
Normal highs sit between 65°F and 85°F in May, June, July, August and September. Of those, August has the fewest days with rain (9).
That is a measurement, not a recommendation: it counts the months whose normal afternoon high sits between 65°F and 85°F, where a light layer is enough by day.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00133584.
When is the last frost in Hampton?
In Hampton, the last spring frost (32°F) comes after April 29 in half of years and after May 10 in one year in ten; the first autumn frost comes before October 9 in half of years and before September 26 in one year in ten.
Frost-free in half of yearsFrost in 1 to 9 years out of 10Frost most years
- Last spring frost, half of years after
- April 291 year in 10 after May 10; 9 in 10 after April 15
- First autumn frost, half of years before
- October 91 year in 10 before September 26; 9 in 10 before October 22
NOAA puts the median frost-free season at 162 days, and the season without a hard freeze (28°F) at 183 days.
A hard freeze (28°F) comes after April 19 in half of springs and before October 20 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Hampton in zone 5a in ZIP code 50441, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Hampton's NOAA station is in zone 5a: the coldest night of a typical year reaches −18°F (24 complete years).
Frost dates for every NOAA station in Iowa · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00133584; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026; the station zone: ACIS daily lows, 1991-2020. A 10% date means one year in ten has a frost after it in spring or before it in autumn.
How hot and how cold does it get in Hampton?
In a normal year in Hampton, 12 days a year reach 90°F, 157 nights fall to 32°F or colder and 108 days bring measurable precipitation.
- Days at 90°F or more
- 12a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 157a normal year
- Days that stay below freezing
- 66high of 32°F or less
- Days with 0.01 inch of precipitation
- 108a normal year
The highest temperature in this station's record (since 1893) is 109°F, on July 24, 1901; the lowest is −35°F, on March 1, 1962.
The wettest calendar year on that record is 2018, with 54.77 in; the snowiest season is 1961–62, with 73.7 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00133584; records: ACIS (NOAA Regional Climate Centers), station USC00133584. Records use complete months only; a month missing more than three days is left out.
How sunny is Hampton?
Over a year 74% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Hampton, 4.0 kWh per square metre a day. July is the sunniest month (82%) and December the cloudiest (66%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 69% | 1.9 |
| February | 75% | 3.0 |
| March | 70% | 3.8 |
| April | 69% | 4.8 |
| May | 71% | 5.6 |
| June | 76% | 6.2 |
| July | 82% | 6.4 |
| August | 80% | 5.5 |
| September | 79% | 4.4 |
| October | 72% | 3.0 |
| November | 71% | 2.1 |
| December | 66% | 1.6 |
Source: NASA POWER solar climatology, 2001-2020 (CERES SYN1deg). Satellite-based, for the 1-degree cell (about 100 km across) around the station, so it describes the area rather than the airport.
How much heating and cooling does Hampton need?
A normal year in Hampton brings 7,363 heating degree days, 37% more than the median U.S. place (5,373), and 712 cooling degree days, 22% fewer than the median (908). Seven months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 2,824 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,499 | 0 |
| February | 1,230 | 0 |
| March | 978 | 0 |
| April | 558 | 3 |
| May | 231 | 42 |
| June | 34 | 163 |
| July | 7 | 244 |
| August | 17 | 180 |
| September | 137 | 71 |
| October | 475 | 9 |
| November | 893 | 0 |
| December | 1,303 | 0 |
| Year (annual) | 7,363 | 712 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00133584. A degree day is one degree of a day's mean temperature below 65°F (heating) or above it (cooling); utilities use them to estimate energy use.
Has Hampton been warmer than normal lately?
2024 averaged 50.2°F, 3.6°F above the 1991-2020 normal of 46.6°F. 3 of the 4 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 48.7°F | +2.1°F | 27.42 |
| 2022 | 45.5°F | −1.1°F | 27.62 |
| 2023 | 49.0°F | +2.4°F | 23.66 |
| 2024 | 50.2°F | +3.6°F | 41.37 |
Over 91 complete years from 1893 to 2024, the station's annual mean temperature rose at a fitted 2.1°F per century (+0.12°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USC00133584; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Hampton's climate compare?
Hampton is warmer than 32 of the other 131 places with their own NOAA record in Iowa, and wetter than 96. Across the 7,247 U.S. stations with normals, its annual mean of 46.6°F is warmer than 26%.
In the Köppen classification computed from these normals, Hampton is Dfa: continental, no dry season, hot summer. What the classes mean.
Places with the most similar year elsewhere
Measured month by month on the normal high, low and precipitation, among places of 20,000 or more people in other states:
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers. Similarity: the root-mean-square difference of the 36 monthly figures, precipitation weighted so an inch counts like 6°F.
Which places near Hampton share this climate record?
9 places have no NOAA station with 1991-2020 normals of their own, and this station is the nearest full record. A place's own climate can differ from these figures, by several degrees where it sits much higher or lower than the station, nearer the coast, or inside a large city's heat; for the larger places the next nearest records are named with their yearly mean, so the spread around them is visible, and places of 50,000 or more have their own page with NOAA's gridded normals.
- Sheffield, IA1,123 people · 9 mi N
- Latimer, IA477 people · 8 mi W
- Coulter, IA220 people · 9 mi W
- Meservey, IA212 people · 18 mi NW
- Chapin, IA146 people · 6 mi N
- Geneva, IA137 people · 7 mi SE
- Hansell, IA85 people · 5 mi E
- Dougherty, IA61 people · 14 mi NE
- Aredale, IA59 people · 11 mi NE
Source: Census Bureau 2024 Gazetteer (place centers) and Vintage 2024 population estimates. Distance and direction from the station to each place's center.
Questions about Hampton's climate
What is the coldest month in Hampton?
January, with a normal high of 25°F and a normal low of 8°F. The warmest is July (83°F by day, 62°F at night).
Does it snow in Hampton?
Yes. NOAA publishes no 1991-2020 snowfall normal for Hampton's NOAA station; the nearest record that keeps one, Iowa Falls (17 miles away), records 28 inches of snow in a normal year.
What is the rainiest month in Hampton?
June, with 6.06 in of precipitation in a normal year; the driest is January with 0.97 in.
What plant hardiness zone is Hampton in?
The USDA's 2023 map puts Hampton in zone 5a in ZIP code 50441, the nearest ZIP area. By the same method at Hampton's NOAA station, the coldest night of a typical year reaches −18°F (24 years, 1991-2020): zone 5a.
How late can frost come in Hampton?
In half of years the last 32°F night comes after April 29; in one year in ten it comes after May 10. Waiting until May 10 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Iowa climateThe statewide normals and every place in the state
- Iowa Falls, IA17 miles from this station, 46.7°F a year
- Allison, IA21 miles from this station, 46.7°F a year
- Clarion, IA27 miles from this station, 47.0°F a year
- Eldora, IA27 miles from this station, 46.9°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made