Keystone, LA
Unincorporated community in St. Martin Parish, Louisiana
Keystone is a small unincorporated community in St. Martin Parish, Louisiana. It is 3.3 miles N of St. Martinville, the nearest town. Its ZIP code is 70519.
Keystone at a glance
- State
- Louisiana
- County
- St. Martin Parish
- ZIP code
- 70519
- Nearest town
- St. Martinville (3.3 mi)
- Time zone
- America/Chicago
- Coordinates
- 30.0803, -91.8375
Weather in Keystone now
Loading the National Weather Service forecast…
Keystone weather by the hour
Keystone weather for the next 7 days
Source: National Weather Service (NOAA) · forecast for the coordinates of Keystone.
This week in Keystone
Sunrise, sunset and moon in Keystone
What is the weather usually like in Keystone?
Köppen climate classification, calculated from the 1991–2020 normals
- Augustwarmest month · 91°F average high
- Januarycoldest month · 42°F average low
- 66.4 inprecipitation per year · 1,687 mm
Average high and low temperature (°F)
Average precipitation (inches)
Best time to visit Keystone: March–April and October–November, with mild temperatures and fewer rainy days.
Source: NOAA NCEI U.S. Climate Normals 1991–2020, station ST MARTINVILLE 3 SW, LA US (USC00168181), adjusted for the elevation of Keystone.
Keystone weather month by month
Sunrise and sunset in Keystone through the year
| Month | Sunrise | Sunset | Daylight |
|---|---|---|---|
| January | 7:02 AM | 5:31 PM | 10 h 28 min |
| February | 6:45 AM | 5:57 PM | 11 h 11 min |
| March | 7:15 AM | 7:16 PM | 12 h 1 min |
| April | 6:38 AM | 7:35 PM | 12 h 57 min |
| May | 6:12 AM | 7:55 PM | 13 h 43 min |
| June | 6:04 AM | 8:11 PM | 14 h 7 min |
| July | 6:15 AM | 8:11 PM | 13 h 56 min |
| August | 6:33 AM | 7:49 PM | 13 h 16 min |
| September | 6:50 AM | 7:14 PM | 12 h 23 min |
| October | 7:08 AM | 6:37 PM | 11 h 29 min |
| November | 6:31 AM | 5:12 PM | 10 h 40 min |
| December | 6:54 AM | 5:10 PM | 10 h 15 min |
Times for the 15th of each month, local time (America/Chicago).
What is the weather like in Keystone?
Keystone has a humid subtropical climate. The warmest month is August, with an average high of 91°F (33°C), and the coldest is January, with average lows of 42°F (5°C).
It gets about 66.4 inches (1,687 mm) of precipitation a year. The wettest month is June and the driest is March.
The best time to visit Keystone is March–April and October–November. The live forecast on this page comes from the National Weather Service and the climate averages from NOAA’s 1991–2020 U.S. Climate Normals.
Webcams near Keystone
The closest live webcam is Lakewood Acres: I-10 at Louisiana Ave. DMS, 15.5 miles NW of Keystone.
Webcams: Windy.com. Distances in a straight line from Keystone.
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Map of Keystone, LA
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Keystone Street View
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Questions about Keystone
Where is Keystone, LA?
Keystone is an unincorporated community in St. Martin Parish, Louisiana, 3.3 miles N of St. Martinville.
What county is Keystone in?
Keystone is in St. Martin Parish, Louisiana.
What is the ZIP code of Keystone, LA?
The ZIP code for Keystone is 70519.
What is the nearest town to Keystone?
St. Martinville, 3.3 miles away.
Are there webcams near Keystone?
Yes. The closest is Lakewood Acres: I-10 at Louisiana Ave. DMS, 15.5 miles away.
What is the hottest month in Keystone?
August, with an average high of 91°F (33°C).
What is the coldest month in Keystone?
January, with an average low of 42°F (5°C).
How much does it rain in Keystone?
About 66.4 inches (1,687 mm) a year; the wettest month is June.
Does it snow in Keystone?
Snow is very rare or not recorded at the nearest weather station.
When is the best time to visit Keystone?
March–April and October–November, when temperatures are most pleasant and rainy days are fewer.
What climate does Keystone have?
Humid subtropical (Köppen Cfa).
Last updated: