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Gretna, United States Snapshot 2026
Where is Gretna?
Gretna, United States
- Continent
- Americas
- Country
- United States
- City
- Gretna
- Population
- 17.9K
- Elevation
- 0 m
- Coordinates
- 29.91°, -90.05°
Gretna is a city in United States with a population of approximately 17.9K. Average temperatures range from 9°C (49°F) in January to 31°C (88°F) in August. The best time to visit is February, March, April, October, November.
Time in Gretna right now
Open full time & time zone page 17:59 59
Monday, June 15, 2026
IANA time zone
America/Chicago
Daylight saving
DST in effect
CST / CDT
Next DST change
November 1
backward -1h
Live weather in Gretna
Daylight in Gretna today
View full sunrise & sunset page Sunrise
Sunset
Day length
14h 04m
Climate normals for Gretna
Long-term monthly averages based on historical data.
January
Good 
February best
Excellent March best
Excellent April best
Excellent May
Good June
Poor July
Wet August
Wet September
Fair October best
Excellent November best
Excellent December
Good | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 17°C / 9°C | 15°C / 6°C | 10days (102 mm) Wet | 7.2h Good | 76% Humid | 4 Moderate | Good | View Details |
| February best | 20°C / 12°C | 20°C / 11°C | 10days (96 mm) Wet | 7.6h Good | 79% Humid | 5 Moderate | Excellent | View Details |
| March best | 22°C / 15°C | 23°C / 14°C | 10days (112 mm) Wet | 9h Good | 77% Humid | 6.6 High | Excellent | View Details |
| April best | 25°C / 18°C | 26°C / 18°C | 9days (99 mm) Wet | 10.1h Excellent | 75% Muggy | 7.5 Very High | Excellent | View Details |
| May | 28°C / 22°C | 32°C / 24°C | 11days (131 mm) Wet | 10.8h Excellent | 78% Humid | 8 Very High | Good | View Details |
| June | 31°C / 25°C | 36°C / 29°C | 16days (164 mm) Wet | 11h Excellent | 80% Humid | 8.4 Very High | Poor | View Details |
| July | 31°C / 26°C | 38°C / 31°C | 22days (182 mm) Wet | 10.6h Excellent | 83% Humid | 8.3 Very High | Wet | View Details |
| August | 31°C / 26°C | 37°C / 31°C | 20days (219 mm) Wet | 10.1h Excellent | 82% Humid | 8 Very High | Wet | View Details |
| September | 30°C / 24°C | 34°C / 28°C | 12days (131 mm) Wet | 10.1h Excellent | 79% Humid | 7 High | Fair | View Details |
| October best | 26°C / 20°C | 28°C / 21°C | 8days (92 mm) Wet | 9.4h Good | 75% Muggy | 5.8 High | Excellent | View Details |
| November best | 22°C / 15°C | 22°C / 13°C | 7days (80 mm) Good | 7.9h Good | 75% Muggy | 4.4 Moderate | Excellent | View Details |
| December | 19°C / 12°C | 18°C / 10°C | 10days (97 mm) Wet | 6.8h Fair | 80% Humid | 3.8 Moderate | Good | View Details |
Monthly Temperatures
HighLow
Line chart showing monthly temperatures. Jan: 17°C / 9°C . Feb: 20°C / 12°C . Mar: 22°C / 15°C . Apr: 25°C / 18°C . May: 28°C / 22°C . Jun: 31°C / 25°C . Jul: 31°C / 26°C . Aug: 31°C / 26°C . Sep: 30°C / 24°C . Oct: 26°C / 20°C . Nov: 22°C / 15°C . Dec: 19°C / 12°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 102 mm. Feb: 96 mm. Mar: 112 mm. Apr: 99 mm. May: 131 mm. Jun: 164 mm. Jul: 182 mm. Aug: 219 mm. Sep: 131 mm. Oct: 92 mm. Nov: 80 mm. Dec: 97 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 76%. Feb: 79%. Mar: 77%. Apr: 75%. May: 78%. Jun: 80%. Jul: 83%. Aug: 82%. Sep: 79%. Oct: 75%. Nov: 75%. Dec: 80%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 22 km/h . Feb: 22 km/h . Mar: 22 km/h . Apr: 22 km/h . May: 19 km/h . Jun: 17 km/h . Jul: 15 km/h . Aug: 15 km/h . Sep: 16 km/h . Oct: 19 km/h . Nov: 19 km/h . Dec: 20 km/h .
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 4. Feb: UV 5. Mar: UV 7. Apr: UV 8. May: UV 8. Jun: UV 8. Jul: UV 8. Aug: UV 8. Sep: UV 7. Oct: UV 6. Nov: UV 4. Dec: UV 4.
Frequently Asked Questions
Gretna has a population of approximately 17.9K.
The best months to visit Gretna are February, March, April, October, November, when temperatures are pleasant and rainfall is lower.
Gretna receives approximately 1505mm of rainfall annually across 145 rainy days.
Gretna is located in United States, in the Americas region.
Gretna sits at an elevation of 0 m (0 ft) above sea level.