Mystic, CT weather in July
Expect warm, often humid weather with some rain in Mystic in July, with highs near 81°F and lows near 66°F. Rain falls on about 10 days. It is one of the warmest months in Mystic.
- Normal high
- 81°F
- Normal low
- 66°F
- Wet days
- 10
- 3.4 in total
- Muggy days
- 18
- dew point 65°F+
How July changes from start to finish
| July 1 | July 31 | |
|---|---|---|
| Normal high | 79°F | 81°F |
| Normal low | 64°F | 67°F |
| Chance of a wet day | 30% | 32% |
| Sunrise / sunset | 5:18 am / 8:25 pm | 5:42 am / 8:06 pm |
| Daylight | 15.1 h | 14.4 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Eastern Time).
A typical July day
- 6 am69°Fdew point 63°F
- 9 am76°Fdew point 63°F
- Noon81°Fdew point 63°F
- 3 pm81°Fdew point 63°F
- 6 pm77°Fdew point 63°F
- 9 pm72°Fdew point 64°F
NOAA hourly normals (local standard time) from Providence T F Green Airport (38 mi away); average wind 8 mph.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°Fnot available
- Beach dayshigh 80-95°F, under 0.05 in of rain, afternoon wind under 15 mph16 of 31
- Hot dayshigh 90°F or more2 of 31
- Muggy daysdaily mean dew point 65°F or more18 of 31
- Wet daysat least 0.01 in of rain or melted snow10 of 31
- Notable rainat least 0.10 in6 of 31
- Freezing nightslow 32°F or below0 of 31
- Snow on the groundsnow depth 1 in or more0 of 31
Average days per July, counted from daily records for each year 1991-2020.
Rain in July
Normal precipitation is 3.4 in; a dry July brings about 2.1 in and a wet one about 4.3 in (25th and 75th percentiles). About 3 days bring half an inch or more, and about 1 an inch or more.
How July varies from year to year
- Warmest July, 1991-20202010: average high 84°F
- Coolest July1996: average high 75°F
- Wettest July2009: 10.6 in
- Driest July1994: 0.8 in
- Highest reading101°F (July 21, 1991)
- Lowest reading52°F (July 3, 2001)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
July compared with June and August
| June | July | August | |
|---|---|---|---|
| Normal high | 75°F | 81°F | 80°F |
| Normal low | 59°F | 66°F | 65°F |
| Wet days | 10 | 10 | 9 |
| Comfortable days | – | – | – |
| Daylight | 15.1 h | 14.8 h | 13.8 h |
Highs change by +6°F from June and -1°F into August.
Nearby alternatives in July
- Warmer: Yonkers, NY105 mi · high 86°F · 10 wet days
- Cooler: Nantucket, MA97 mi · high 75°F · 12 wet days
How Mystic ranks in July
- Normal high314th warmest of 378 cities; 5th of 5 in Connecticut
- Wet days206th driest of 378
What to pack for Mystic in July
- A rain jacket or umbrella – rain on about 10 days
- A swimsuit – about 16 beach days
- Sunglasses and sunscreen – about 14.8 hours of daylight and highs near 81°F
Heating and cooling
July has 2 heating degree days and 261 cooling degree days (base 65°F), 4% of the year's total heating and cooling demand.
Questions
How hot is Mystic in July?
The normal high is 81°F and the normal low is 66°F. From 1991 to 2020 the hottest July reading was 101°F (July 21, 1991).
Does it rain a lot in Mystic in July?
About 10 days in July have at least 0.01 in of precipitation, and the normal total is 3.4 in. The wettest July in 1991-2020 was in 2009 (10.6 in); the driest was in 1994 (0.9 in).
Where the numbers come from
- Temperature, rain, snowfall and snow depth: Groton (USC00063207), 3.7 mi W of the city center, 40 ft . NOAA normals and daily records, 1991-2020.
- Frost dates: Groton New London Airport (USW00014707), 4.7 mi WSW of the city center, 10 ft . NOAA normals and daily records, 1991-2020.
- Humidity and wind by hour: Providence T F Green Airport (USW00014765), 38 mi NE of the city center, 60 ft (52 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Groton-New London Airport (725046-14707), 4.7 mi WSW of the city center, 8 ft . Hourly observations, 1991-2020.
- Not available for this location: cloud cover (no station close enough or similar enough in elevation).