Le Mars, United States experiences average highs of 16°C (61°F) and lows of 6°C (43°F) throughout the year. Rainfall is moderate, averaging about 8 rainy days per month. Sunshine is abundant, averaging about 9 hours per day. Average highs have warmed by 0.6°C (1.1°F) across the available records.
Le Mars, United States Weather & Climate 2026
Monthly climate averages for Le Mars, United States. Based on 10-year ERA5 reanalysis data.
Climate Overview
Drier season: Jan–Dec 
Wetter season: Mar–Aug At-a-Glance Climate Summary
Live Weather & Air Quality
Key figures
Climate Score
5.4/10
Best: June, July, August, September
UV Index
5
Low
Temperature 16°C / 6°C
Feels Like 14°C / 2°C
Rainy Days 8
Rainfall 69 mm
Sunshine 9 h
Humidity 67%
Wind Speed 23 km/h
Dew Point 5°C
Snow Days 5 days
Frost Days 18 days
Hottest Month
30°C
July
Avg Low19°C
Rain8days
Coldest Month
-10°C
January
Avg High-1°C
Rain4days
Driest Month
4days
January
Avg High-1°C
Avg Low-10°C
Windiest Month
27 km/h
April (Gusts 50)
Worst Time to Visit
Consider avoiding January, February, March, December due to very cold temperatures.
Sun Position
Sunrise 05:47
Daylight 15.3h
Sunset 21:06
Live conditions—
Le Mars on the map · live conditions
Le Mars, United States
- Continent
- Americas
- Country
- United States
- City
- Le Mars
- Population
- 9.8K
- Elevation
- 376 m
- Coordinates
- 42.79°, -96.17°
Seasonal Breakdown
Spring
Mar–May
Avg High 16°C
Avg Low 4°C
Rain 10 days/mo
Summer
Jun–Aug
Avg High 29°C
Avg Low 18°C
Rain 9 days/mo
3/3 best months
Autumn
Sep–Nov
Avg High 17°C
Avg Low 8°C
Rain 6 days/mo
1/3 best months
Winter
Dec–Feb
Avg High 1°C
Avg Low -9°C
Rain 5 days/mo
Climate Charts
Based on historical averages (2016–2025)
Monthly Temperatures
HighLowShaded bands show the typical range across the available yearly records.
Line chart showing monthly temperatures. Jan: -1°C / -10°C . Feb: 2°C / -9°C . Mar: 10°C / -1°C . Apr: 16°C / 4°C . May: 22°C / 11°C . Jun: 29°C / 18°C . Jul: 30°C / 19°C . Aug: 28°C / 18°C . Sep: 26°C / 16°C . Oct: 17°C / 7°C . Nov: 9°C / 0°C . Dec: 2°C / -6°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 27 mm. Feb: 26 mm. Mar: 70 mm. Apr: 95 mm. May: 128 mm. Jun: 110 mm. Jul: 71 mm. Aug: 97 mm. Sep: 70 mm. Oct: 63 mm. Nov: 31 mm. Dec: 37 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 72%. Feb: 68%. Mar: 65%. Apr: 62%. May: 65%. Jun: 66%. Jul: 71%. Aug: 72%. Sep: 66%. Oct: 62%. Nov: 67%. Dec: 71%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 23 km/h . Feb: 23 km/h . Mar: 25 km/h . Apr: 27 km/h . May: 23 km/h . Jun: 22 km/h . Jul: 19 km/h . Aug: 20 km/h . Sep: 22 km/h . Oct: 24 km/h . Nov: 23 km/h . Dec: 23 km/h .
Sunshine
Sunshine
Sunshine: Jan: 6h. Feb: 8h. Mar: 8h. Apr: 9h. May: 10h. Jun: 13h. Jul: 13h. Aug: 11h. Sep: 10h. Oct: 8h. Nov: 7h. Dec: 6h.
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 3. Feb: UV 4. Mar: UV 5. Apr: UV 6. May: UV 7. Jun: UV 7. Jul: UV 7. Aug: UV 7. Sep: UV 6. Oct: UV 4. Nov: UV 3. Dec: UV 2.
Monthly Daylight Hours
Daylight12h reference
Monthly Dew Point & Comfort
Dew Point Dry Comfortable Humid Muggy Oppressive
Snow Days
Snow DaysSnowfall
Snow Days: Jan: 9 days. Feb: 8 days. Mar: 6 days. Apr: 3 days. May: 0 days. Jun: 0 days. Jul: 0 days. Aug: 0 days. Sep: 0 days. Oct: 1 days. Nov: 3 days. Dec: 8 days.
Climate Trends
Average highs have warmed by 0.6°C (1.1°F) across the available records. Average rainfall is trending drier by about 20 mm.
2016 to 2025
Avg high Avg rainfall
Climate summary
| Last 12 months | All years | |
|---|---|---|
| Hottest month | Jul 2025 · 29°C | Jul · 30°C |
| Coldest month | Feb 2025 · -11°C | Jan · -10°C |
| Wettest month | Jul 2025 · 152 mm | May · 128 mm |
| Windiest month | Mar 2025 · 27 km/h | Apr · 27 km/h |
Month-by-Month Weather Table
January
Poor 
February
Poor March
Poor April
Fair May
Good June best
Excellent July best
Excellent August best
Excellent September best
Excellent October
Fair November
Poor December
Poor | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | -1°C / -10°C | -6°C / -15°C | 4days (27 mm) Good | 6h Fair | 72% Muggy | 2.7 Moderate | Poor | View Details |
| February | 2°C / -9°C | -3°C / -15°C | 5days (26 mm) Good | 7.7h Good | 68% Muggy | 3.6 Moderate | Poor | View Details |
| March | 10°C / -1°C | 6°C / -6°C | 8days (70 mm) Wet | 8h Good | 65% Muggy | 4.9 Moderate | Poor | View Details |
| April | 16°C / 4°C | 12°C / -1°C | 10days (95 mm) Wet | 9.2h Good | 62% Muggy | 5.9 High | Fair | View Details |
| May | 22°C / 11°C | 21°C / 9°C | 13days (128 mm) Wet | 9.9h Good | 65% Muggy | 6.9 High | Good | View Details |
| June best | 29°C / 18°C | 30°C / 17°C | 10days (110 mm) Wet | 12.5h Excellent | 66% Muggy | 7.4 Very High | Excellent | View Details |
| July best | 30°C / 19°C | 32°C / 20°C | 8days (71 mm) Wet | 12.6h Excellent | 71% Muggy | 7.3 Very High | Excellent | View Details |
| August best | 28°C / 18°C | 30°C / 19°C | 10days (97 mm) Wet | 11.4h Excellent | 72% Muggy | 6.8 High | Excellent | View Details |
| September best | 26°C / 16°C | 26°C / 14°C | 7days (70 mm) Good | 9.8h Good | 66% Muggy | 5.7 High | Excellent | View Details |
| October | 17°C / 7°C | 14°C / 4°C | 7days (63 mm) Good | 7.8h Good | 62% Muggy | 4 Moderate | Fair | View Details |
| November | 9°C / 0°C | 5°C / -5°C | 5days (31 mm) Good | 6.7h Fair | 67% Muggy | 2.7 Moderate | Poor | View Details |
| December | 2°C / -6°C | -3°C / -12°C | 5days (37 mm) Good | 6h Fair | 71% Muggy | 2.2 Moderate | Poor | View Details |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit Le Mars are June, July, August, September, when temperatures are comfortable and rainfall is at its lowest. This is based on 10-year climate averages for Le Mars, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in Le Mars is July, with average daytime highs of 30°C (85°F). Plan outdoor activities for early morning or late afternoon if visiting during this period.
The coldest month in Le Mars is January, with average overnight lows of -10°C (14°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in Le Mars is May, averaging 128mm of precipitation across 13 rainy days. An umbrella or waterproof jacket is essential.
The rainy season in Le Mars runs through May, April, June, August, with the heaviest rainfall in May. Based on 10-year averages for Le Mars.
Le Mars receives approximately 108 sunshine hours per year. The sunniest month is July with around 13 hours. Based on climate data for Le Mars.
The least favorable months to visit Le Mars are January, February, March, December, primarily due to very cold temperatures. For the best conditions, consider June, July, August, September instead.
The annual average UV index in Le Mars is 5, classified as moderate. Standard sun protection (sunscreen, hat) is recommended during prolonged outdoor exposure.
Average humidity in Le Mars is 67%, classified as moderate. Humidity levels are generally comfortable and should not affect outdoor activities for most people.
Yes, Le Mars receives snow. Months with snowfall average 5 snow days and 10 cm (4 in) of accumulation, with about 18 frost days during winter.
Average wind speeds in Le Mars are 23 km/h (14 mph). The windiest month is April with peak winds reaching 27 km/h (17 mph) (gusts up to 50 km/h / 31 mph).
Le Mars averages 6 clear-sky days per month with overall cloud cover around 51%. The clearest skies occur in September.
The annual average dew point in Le Mars is 5°C (41°F), which feels dry and comfortable. Outdoor activities are comfortable year-round from a humidity standpoint.
Le Mars has a Hot-Summer Continental climate, classified as Dfa under the Köppen system. Continental climates experience extreme temperature ranges — hot summers and cold, snowy winters.
The 'feels like' temperature in Le Mars ranges from 2°C (36°F) to 14°C (57°F) on average. Wind chill makes winters feel noticeably colder than the actual temperature — layered clothing is recommended.
Yes, June is a great time to visit Le Mars. It earns a climate score of 8.7/10 with Excellent.
For June in Le Mars, pack Umbrella, Waterproof jacket, Breathable clothing, Sunscreen (SPF 30+), Sun hat. With average highs of 29°C (83°F) and 10 rainy days, these essentials will keep you comfortable.
Data Source
Climate data derived from ERA5 reanalysis (ECMWF), averaged over 2016–2025. Sea surface temperature from marine reanalysis data. Climate scores and seasonal estimates are computed by WorldStats.
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