Mystic, CT weather in October
October in Mystic: cool, with frequent rain. Highs 63°F, lows 47°F, about 10 days with rain.
- Normal high
- 63°F
- Normal low
- 47°F
- Wet days
- 10
- 4.4 in total
- Muggy days
- 1
- dew point 65°F+
How October changes from start to finish
| October 1 | October 31 | |
|---|---|---|
| Normal high | 68°F | 58°F |
| Normal low | 52°F | 42°F |
| Chance of a wet day | 35% | 33% |
| Sunrise / sunset | 6:44 am / 6:30 pm | 7:18 am / 5:44 pm |
| Daylight | 11.8 h | 10.4 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 October day
- 6 am49°Fdew point 44°F
- 9 am56°Fdew point 45°F
- Noon61°Fdew point 45°F
- 3 pm62°Fdew point 45°F
- 6 pm56°Fdew point 46°F
- 9 pm53°Fdew point 46°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 mph0 of 31
- Hot dayshigh 90°F or more0 of 31
- Muggy daysdaily mean dew point 65°F or more1 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 below1 of 31
- Snow on the groundsnow depth 1 in or more0 of 31
Average days per October, counted from daily records for each year 1991-2020.
Rain in October
Normal precipitation is 4.4 in; a dry October brings about 2.1 in and a wet one about 6.2 in (25th and 75th percentiles). About 3 days bring half an inch or more, and about 1 an inch or more.
How October varies from year to year
- Warmest October, 1991-20202017: average high 70°F
- Coolest October1992: average high 60°F
- Wettest October2017: 8.4 in
- Driest October2000: 0.5 in
- Highest reading87°F (October 2, 2019)
- Lowest reading26°F (October 23, 1997)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
October compared with September and November
| September | October | November | |
|---|---|---|---|
| Normal high | 74°F | 63°F | 53°F |
| Normal low | 58°F | 47°F | 38°F |
| Wet days | 10 | 10 | 10 |
| Comfortable days | – | – | 2 |
| Daylight | 12.5 h | 11.1 h | 9.9 h |
Highs change by -11°F from September and -10°F into November.
Nearby alternatives in October
- Warmer: Dover, DE241 mi · high 69°F · 8 wet days
- Cooler: Rutland, VT164 mi · high 58°F · 13 wet days
How Mystic ranks in October
- Normal high278th warmest of 378 cities; 3rd of 5 in Connecticut
- Wet days295th driest of 378
What to pack for Mystic in October
- A rain jacket or umbrella – rain on about 10 days
Frost in October
The first fall frost typically comes around Oct 28; in 1 year in 10 it comes before Oct 13. All frost dates for Mystic.
Heating and cooling
October has 314 heating degree days and 10 cooling degree days (base 65°F), 5% of the year's total heating and cooling demand.
Questions
How cold is Mystic in October?
The normal high is 63°F and the normal low is 47°F. From 1991 to 2020 the coldest October reading was 26°F (October 23, 1997).
Does it rain a lot in Mystic in October?
About 10 days in October have at least 0.01 in of precipitation, and the normal total is 4.4 in. The wettest October in 1991-2020 was in 2017 (8.5 in); the driest was in 2000 (0.5 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).