Gray Sky Index · Missouri

St. Louis, MO: gray days, sunny days and the best month to shoot

St. Louis averages 164 gray days and 202 clear or partly cloudy days a year — #17 grayest of the 43 US metros we track. July and August and September are the clearest for exterior shoots; January and December the grayest.

Gray days a year: 164; #17 grayest of 43 metros
Sunny days a year: 202; 101 clear, 101 partly cloudy
Clearest month: July; fewest gray days: shoot exteriors
Grayest month: January; most gray days: plan interiors

Gray days by month in St. Louis

Mean gray days each month at St. Louis, 47 years of record. The clearest months are in ink.

17 in January
15 in February
16 in March
15 in April
14 in May
12 in June
10 in July
10 in August
10 in September
11 in October
15 in November
17 in December

Shoot this week in St. Louis?

National Weather Service forecast: average sky cover from 9am to 5pm local time, for the next 7 days.

Interiors today, exteriors Mon, Nov 9

Today 90% sky cover, 99% chance of rain. Least gray day this week: Mon, Nov 9, 11%.

90%Tue11/3
79%Wed11/4
18%Thu11/5
67%Fri11/6
55%Sat11/7
25%Sun11/8
11%Mon11/9

Clear (35% or less)Partly cloudy (to 65%)Gray

Best time to sell a house in St. Louis

Share of the year’s new listings by month, 2023–2025 (Realtor.com). The three busiest months are in ink.

5.8% in January
7.1% in February
8.5% in March
9.5% in April
9.6% in May
9.7% in June
9.6% in July
9.2% in August
9.3% in September
8.9% in October
7.4% in November
5.4% in December

June, May, July bring 28.9% of St. Louis’s new listings; December the fewest. Shoot exteriors in the clearest weeks before the peak, and you list with the photos already done.

St. Louis scores 53/100 on the Listing Difficulty Index — #20 hardest of 43: 50 days on market and 19.9% of listings with a price cut. See every market’s score.

Nearby metros

Indianapolis, IN179 gray days a year
Kansas City, MO149 gray days a year
Louisville, KY171 gray days a year
Chicago, IL176 gray days a year

All 43 metros in the Gray Sky Index

St. Louis: questions

Does St. Louis get a lot of sun?

St. Louis averages 202 clear or partly cloudy days a year and 164 gray days, on NOAA’s long-term record.

What is the cloudiest month in St. Louis?

January and December has the most gray days in St. Louis. July and August and September has the fewest, which makes it the easiest month for exterior shoots.

When is the best time to list a house in St. Louis?

Most new listings in St. Louis come on the market in June, May, July. Listing just before the peak meets the most buyers with the least competition; plan exterior shoots for the clearest days in the weeks before.

More free tools

Listing Difficulty Index
A 0–100 score for 43 US metros on how hard a listing has to work to stand out, and each market’s busiest listing months.
Listing Photo Rules Tracker
Every state law and MLS rule on AI-edited and virtually staged listing photos: what to disclose, when it applies and the penalties.

Sources: NOAA NCEI Comparative Climatic Data: mean number of clear, partly cloudy and cloudy days; US National Weather Service gridpoint forecast.