Logan, Iowa climate: Normal weather by month, frost dates and records
Logan's normal year runs from 10°F January nights to 86°F July afternoons, with 34.4 inches of precipitation and 29 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 9.5°C, January lows of −12°C, July highs of 30°C, 875 mm of precipitation a year.
- NOAA stationLogan
- Station IDUSC00134894
- Location41.64°N 95.79°W
- Elevation990 ft (302 m)
- From the centerunder 1 mile
- Population1,351
On October 23, the normal high in Logan is 61°F and the normal low 35°F, and the chance of measurable rain or snow is 21%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Logan.
- Jan 31° 10°
- Feb 36° 14°
- Mar 49° 26°
- Apr 62° 36°
- May 73° 49°
- Jun 82° 60°
- Jul 86° 64°
- Aug 84° 61°
- Sep 78° 51°
- Oct 65° 38°
- Nov 49° 25°
- Dec 35° 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 Logan each month?
July is the warmest month, with normal highs of 86°F; January the coldest, with normal lows of 10°F. The most precipitation falls in June (5.21 in), the least in January (0.72 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 31°F | 10°F | 20.3°F | 0.72 | 7.9 | 5 | <1 | 31 | 9 h 30 min |
| February | 36°F | 14°F | 24.5°F | 0.98 | 6.4 | 6 | <1 | 27 | 10 h 30 min |
| March | 49°F | 26°F | 37.4°F | 1.82 | 4.1 | 7 | <1 | 24 | 11 h 50 min |
| April | 62°F | 36°F | 49.0°F | 3.40 | 0.9 | 10 | <1 | 10 | 13 h 20 min |
| May | 73°F | 49°F | 61.0°F | 4.95 | 0.0 | 13 | 1 | 1 | 14 h 30 min |
| June | 82°F | 60°F | 71.3°F | 5.21 | 0.0 | 10 | 5 | <1 | 15 h 10 min |
| July | 86°F | 64°F | 74.8°F | 4.06 | 0.0 | 9 | 8 | <1 | 15 h |
| August | 84°F | 61°F | 72.5°F | 4.29 | 0.0 | 9 | 5 | <1 | 13 h 50 min |
| September | 78°F | 51°F | 64.4°F | 3.54 | 0.0 | 8 | 3 | 1 | 12 h 30 min |
| October | 65°F | 38°F | 51.4°F | 2.61 | 0.6 | 7 | <1 | 9 | 11 h 10 min |
| November | 49°F | 25°F | 37.0°F | 1.45 | 2.2 | 5 | <1 | 23 | 9 h 50 min |
| December | 35°F | 15°F | 25.3°F | 1.40 | 6.6 | 6 | <1 | 30 | 9 h 10 min |
| Year (annual) | 61°F | 38°F | 49.1°F | 34.43 | 28.7 | 93 | 24 | 154 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | −1°C | −12°C | −6.5°C | 18 mm | 20 cm |
| February | 2°C | −10°C | −4.2°C | 25 mm | 16 cm |
| March | 9°C | −3°C | 3.0°C | 46 mm | 10 cm |
| April | 17°C | 2°C | 9.4°C | 86 mm | 2 cm |
| May | 23°C | 10°C | 16.1°C | 126 mm | 0 cm |
| June | 28°C | 16°C | 21.8°C | 132 mm | 0 cm |
| July | 30°C | 18°C | 23.8°C | 103 mm | 0 cm |
| August | 29°C | 16°C | 22.5°C | 109 mm | 0 cm |
| September | 25°C | 11°C | 18.0°C | 90 mm | 0 cm |
| October | 18°C | 3°C | 10.8°C | 66 mm | 2 cm |
| November | 9°C | −4°C | 2.8°C | 37 mm | 6 cm |
| December | 2°C | −9°C | −3.7°C | 36 mm | 17 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00134894; 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 Logan?
Normal highs sit between 65°F and 85°F in May, June, August and September. Of those, September has the fewest days with rain (8).
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 USC00134894.
When is the last frost in Logan?
In Logan, the last spring frost (32°F) comes after April 29 in half of years and after May 13 in one year in ten; the first autumn frost comes before October 8 in half of years and before September 23 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 13; 9 in 10 after April 15
- First autumn frost, half of years before
- October 81 year in 10 before September 23; 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 181 days.
A hard freeze (28°F) comes after April 19 in half of springs and before October 19 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Logan in zone 5b in ZIP code 51546, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Logan's NOAA station is in zone 5a: the coldest night of a typical year reaches −17°F (26 complete years); the map interpolates between stations and terrain, so the station and the ZIP area can differ by half a zone.
Frost dates for every NOAA station in Iowa · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00134894; 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 Logan?
In a normal year in Logan, 24 days a year reach 90°F (1 of them 100°F or more), 154 nights fall to 32°F or colder and 93 days bring measurable precipitation.
- Days at 90°F or more
- 24a normal year
- Days at 100°F or more
- 1a normal year
- Nights at 32°F or colder
- 154a normal year
- Days that stay below freezing
- 48high of 32°F or less
- Days with 0.01 inch of precipitation
- 93a normal year
- Days with 1 inch of snow or more
- 11a normal year
The highest temperature in this station's record (since 1893) is 117°F, on July 25, 1936; the lowest is −35°F, on January 12, 1912.
The wettest calendar year on that record is 2015, with 48.81 in; the snowiest season is 1959–60, with 68.0 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00134894; records: ACIS (NOAA Regional Climate Centers), station USC00134894. Records use complete months only; a month missing more than three days is left out.
How sunny is Logan?
Over a year 76% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Logan, 4.2 kWh per square metre a day. July is the sunniest month (83%) and December the cloudiest (69%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 69% | 2.0 |
| February | 74% | 3.0 |
| March | 69% | 3.8 |
| April | 70% | 4.9 |
| May | 73% | 5.8 |
| June | 79% | 6.5 |
| July | 83% | 6.5 |
| August | 81% | 5.6 |
| September | 81% | 4.6 |
| October | 75% | 3.2 |
| November | 74% | 2.3 |
| December | 69% | 1.7 |
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 Logan need?
A normal year in Logan brings 6,702 heating degree days, 25% more than the median U.S. place (5,373), and 935 cooling degree days, 3% more 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 3,203 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,386 | 0 |
| February | 1,134 | 0 |
| March | 858 | 1 |
| April | 487 | 7 |
| May | 188 | 63 |
| June | 22 | 209 |
| July | 3 | 309 |
| August | 10 | 241 |
| September | 114 | 95 |
| October | 431 | 11 |
| November | 840 | 0 |
| December | 1,231 | 0 |
| Year (annual) | 6,702 | 935 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00134894. 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 Logan been warmer than normal lately?
2025 averaged 50.5°F, 1.4°F above the 1991-2020 normal of 49.1°F. 3 of the 3 complete years since 2023 ran warmer than the normal.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2023 | 51.3°F | +2.2°F | 25.94 | 19.5 |
| 2024 | 51.9°F | +2.8°F | 32.92 | 20.2 |
| 2025 | 50.5°F | +1.4°F | 38.91 | 23.2 |
Over 133 complete years from 1874 to 2025, the station's annual mean temperature rose at a fitted 2.0°F per century (+0.11°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USC00134894; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Logan's climate compare?
Logan is warmer than 89 of the other 131 places with their own NOAA record in Iowa, and wetter than 35. Across the 7,247 U.S. stations with normals, its annual mean of 49.1°F is warmer than 36%.
In the Köppen classification computed from these normals, Logan 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 Logan share this climate record?
4 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.
- Woodbine, IA1,707 people · 8 mi NE
- Dunlap, IA1,030 people · 18 mi NE
- Persia, IA292 people · 12 mi E
- Magnolia, IA194 people · 6 mi NW
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 Logan's climate
What is the coldest month in Logan?
January, with a normal high of 31°F and a normal low of 10°F. The warmest is July (86°F by day, 64°F at night).
Does it snow in Logan?
Yes: 29 inches in a normal year, falling on 15 days with 0.1 inch or more, the most in January (7.9 inches).
What is the rainiest month in Logan?
June, with 5.21 in of precipitation in a normal year; the driest is January with 0.72 in.
What plant hardiness zone is Logan in?
The USDA's 2023 map puts Logan in zone 5b in ZIP code 51546, the nearest ZIP area. By the same method at Logan's NOAA station, the coldest night of a typical year reaches −17°F (26 years, 1991-2020): zone 5a.
How late can frost come in Logan?
In half of years the last 32°F night comes after April 29; in one year in ten it comes after May 13. Waiting until May 13 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Iowa climateThe statewide normals and every place in the state
- Little Sioux, IA19 miles from this station, 48.1°F a year
- Blair, NE19 miles from this station, 50.2°F a year
- Fort Calhoun, NE21 miles from this station, 49.3°F a year
- Tekamah, NE22 miles from this station, 50.1°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made