Port Jervis, New York climate: Normal weather by month, frost dates and records
Port Jervis's normal year runs from 16°F January nights to 84°F July afternoons, with 47.2 inches of precipitation and 43 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 9.3°C, January lows of −9°C, July highs of 29°C, 1,198 mm of precipitation a year.
- NOAA stationPort Jervis
- Station IDUSC00306774
- Location41.39°N 74.69°W
- Elevation580 ft (177 m)
- Population8,566
On October 23, the normal high in Port Jervis is 59°F and the normal low 37°F, and the chance of measurable rain or snow is 30%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Port Jervis.
- Jan 34° 16°
- Feb 37° 17°
- Mar 46° 25°
- Apr 60° 35°
- May 71° 46°
- Jun 79° 55°
- Jul 84° 60°
- Aug 81° 58°
- Sep 74° 51°
- Oct 62° 40°
- Nov 49° 30°
- Dec 39° 22°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like in Port Jervis each month?
July is the warmest month, with normal highs of 84°F; January the coldest, with normal lows of 16°F. The most precipitation falls in June (4.72 in), the least in February (2.63 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 34°F | 16°F | 24.9°F | 3.07 | 11.2 | 10 | <1 | 28 | 9 h 30 min |
| February | 37°F | 17°F | 27.1°F | 2.63 | 10.6 | 9 | <1 | 26 | 10 h 40 min |
| March | 46°F | 25°F | 35.4°F | 3.66 | 9.6 | 10 | <1 | 24 | 11 h 50 min |
| April | 60°F | 35°F | 47.4°F | 3.78 | 0.9 | 11 | <1 | 11 | 13 h 20 min |
| May | 71°F | 46°F | 58.4°F | 3.58 | 0.0 | 12 | 1 | 2 | 14 h 30 min |
| June | 79°F | 55°F | 66.9°F | 4.72 | 0.0 | 11 | 2 | <1 | 15 h 10 min |
| July | 84°F | 60°F | 71.8°F | 4.72 | 0.0 | 10 | 6 | <1 | 14 h 50 min |
| August | 81°F | 58°F | 69.8°F | 4.64 | 0.0 | 10 | 3 | <1 | 13 h 50 min |
| September | 74°F | 51°F | 62.4°F | 4.54 | 0.0 | 9 | 1 | <1 | 12 h 30 min |
| October | 62°F | 40°F | 50.7°F | 4.67 | 0.0 | 10 | <1 | 6 | 11 h 10 min |
| November | 49°F | 30°F | 39.7°F | 3.27 | 1.5 | 9 | <1 | 19 | 9 h 50 min |
| December | 39°F | 22°F | 30.4°F | 3.90 | 8.8 | 11 | <1 | 27 | 9 h 10 min |
| Year (annual) | 60°F | 38°F | 48.8°F | 47.18 | 42.6 | 121 | 14 | 143 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 1°C | −9°C | −3.9°C | 78 mm | 28 cm |
| February | 3°C | −8°C | −2.7°C | 67 mm | 27 cm |
| March | 8°C | −4°C | 1.9°C | 93 mm | 24 cm |
| April | 16°C | 2°C | 8.6°C | 96 mm | 2 cm |
| May | 22°C | 8°C | 14.7°C | 91 mm | 0 cm |
| June | 26°C | 13°C | 19.4°C | 120 mm | 0 cm |
| July | 29°C | 16°C | 22.1°C | 120 mm | 0 cm |
| August | 27°C | 15°C | 21.0°C | 118 mm | 0 cm |
| September | 23°C | 11°C | 16.9°C | 115 mm | 0 cm |
| October | 17°C | 4°C | 10.4°C | 119 mm | 0 cm |
| November | 10°C | −1°C | 4.3°C | 83 mm | 4 cm |
| December | 4°C | −5°C | −0.9°C | 99 mm | 22 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00306774; annual normals. Wet days: 0.01 inch or more; 90°F days and freezing nights: NOAA's day counts. Daylight: sunrise to sunset on the 15th, computed from the latitude.
When is the best weather to visit Port Jervis?
Normal highs sit between 65°F and 85°F in May, June, July, August and September. Of those, September has the fewest days with rain (9).
That is a measurement, not a recommendation: it counts the months whose normal afternoon high sits between 65°F and 85°F, where a light layer is enough by day.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00306774.
When is the last frost in Port Jervis?
In Port Jervis, the last spring frost (32°F) comes after May 5 in half of years and after May 19 in one year in ten; the first autumn frost comes before October 10 in half of years and before September 28 in one year in ten.
Frost-free in half of yearsFrost in 1 to 9 years out of 10Frost most years
- Last spring frost, half of years after
- May 51 year in 10 after May 19; 9 in 10 after April 22
- First autumn frost, half of years before
- October 101 year in 10 before September 28; 9 in 10 before October 29
NOAA puts the median frost-free season at 158 days, and the season without a hard freeze (28°F) at 183 days.
A hard freeze (28°F) comes after April 23 in half of springs and before October 24 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Port Jervis in zone 6b in ZIP code 18336, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Port Jervis's NOAA station is in zone 6b: the coldest night of a typical year reaches −4°F (30 complete years).
Frost dates for every NOAA station in New York · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00306774; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026; the station zone: ACIS daily lows, 1991-2020. A 10% date means one year in ten has a frost after it in spring or before it in autumn.
How hot and how cold does it get in Port Jervis?
In a normal year in Port Jervis, 14 days a year reach 90°F, 143 nights fall to 32°F or colder and 121 days bring measurable precipitation.
- Days at 90°F or more
- 14a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 143a normal year
- Days that stay below freezing
- 30high of 32°F or less
- Days with 0.01 inch of precipitation
- 121a normal year
- Days with 1 inch of snow or more
- 11a normal year
The highest temperature in this station's record (since 1890) is 105°F, on July 9, 1936; the lowest is −26°F, on January 14, 1912.
The wettest calendar year on that record is 2011, with 74.07 in; the snowiest season is 1966–67, with 101.5 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00306774; records: ACIS (NOAA Regional Climate Centers), station USC00306774. Records use complete months only; a month missing more than three days is left out.
How sunny is Port Jervis?
Over a year 71% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Port Jervis, 3.8 kWh per square metre a day. July is the sunniest month (78%) and December the cloudiest (61%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 65% | 1.8 |
| February | 67% | 2.6 |
| March | 67% | 3.6 |
| April | 68% | 4.6 |
| May | 68% | 5.3 |
| June | 72% | 5.8 |
| July | 78% | 5.9 |
| August | 76% | 5.1 |
| September | 75% | 4.2 |
| October | 68% | 2.8 |
| November | 68% | 2.0 |
| December | 61% | 1.4 |
Source: NASA POWER solar climatology, 2001-2020 (CERES SYN1deg). Satellite-based, for the 1-degree cell (about 100 km across) around the station, so it describes the area rather than the airport.
How much heating and cooling does Port Jervis need?
A normal year in Port Jervis brings 6,469 heating degree days, 20% more than the median U.S. place (5,373), and 582 cooling degree days, 36% fewer than the median (908). Seven months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 2,664 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,241 | 0 |
| February | 1,060 | 0 |
| March | 919 | 0 |
| April | 532 | 4 |
| May | 233 | 30 |
| June | 53 | 110 |
| July | 6 | 216 |
| August | 16 | 166 |
| September | 131 | 53 |
| October | 446 | 3 |
| November | 758 | 0 |
| December | 1,074 | 0 |
| Year (annual) | 6,469 | 582 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00306774. A degree day is one degree of a day's mean temperature below 65°F (heating) or above it (cooling); utilities use them to estimate energy use.
Has Port Jervis been warmer than normal lately?
2025 averaged 49.2°F, 0.4°F above the 1991-2020 normal of 48.8°F. 5 of the 5 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2021 | 50.3°F | +1.5°F | – | – |
| 2022 | 49.7°F | +0.9°F | 46.48 | 41.2 |
| 2023 | 51.1°F | +2.4°F | – | – |
| 2024 | 51.4°F | +2.6°F | 46.00 | 46.5 |
| 2025 | 49.2°F | +0.4°F | 36.88 | 36.0 |
Over 126 complete years from 1880 to 2025, the station's annual mean temperature rose at a fitted 2.5°F per century (+0.14°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USC00306774; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Port Jervis's climate compare?
Port Jervis is warmer than 90 of the other 130 places with their own NOAA record in New York, and wetter than 87. Across the 7,247 U.S. stations with normals, its annual mean of 48.8°F is warmer than 35%.
In the Köppen classification computed from these normals, Port Jervis is Dfa: continental, no dry season, hot summer. What the classes mean.
Places with the most similar year elsewhere
Measured month by month on the normal high, low and precipitation, among places of 20,000 or more people in other states:
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers. Similarity: the root-mean-square difference of the 36 monthly figures, precipitation weighted so an inch counts like 6°F.
Which places near Port Jervis share this climate record?
8 places have no NOAA station with 1991-2020 normals of their own, and this station is the nearest full record. A place's own climate can differ from these figures, by several degrees where it sits much higher or lower than the station, nearer the coast, or inside a large city's heat; for the larger places the next nearest records are named with their yearly mean, so the spread around them is visible, and places of 50,000 or more have their own page with NOAA's gridded normals.
- Pocono Woodland Lakes, PA3,800 people · 11 mi SW
- Hemlock Farms, PA3,671 people · 19 mi W
- Gold Key Lake, PA2,721 people · 14 mi W
- Conashaugh Lakes, PA1,659 people · 17 mi W
- Birchwood Lakes, PA1,255 people · 15 mi SW
- Milford, PA1,144 people · 7 mi SW
- Sunrise Lake, PA998 people · 15 mi W
- Vernon Valley, NJ983 people · 15 mi SE
Source: Census Bureau 2024 Gazetteer (place centers) and Vintage 2024 population estimates. Distance and direction from the station to each place's center.
Questions about Port Jervis's climate
What is the coldest month in Port Jervis?
January, with a normal high of 34°F and a normal low of 16°F. The warmest is July (84°F by day, 60°F at night).
Does it snow in Port Jervis?
Yes: 43 inches in a normal year, falling on 18 days with 0.1 inch or more, the most in January (11.2 inches).
What is the rainiest month in Port Jervis?
June, with 4.72 in of precipitation in a normal year; the driest is February with 2.63 in.
What plant hardiness zone is Port Jervis in?
The USDA's 2023 map puts Port Jervis in zone 6b in ZIP code 18336, the nearest ZIP area. By the same method at Port Jervis's NOAA station, the coldest night of a typical year reaches −4°F (30 years, 1991-2020): zone 6b.
How late can frost come in Port Jervis?
In half of years the last 32°F night comes after May 5; in one year in ten it comes after May 19. Waiting until May 19 leaves about a one-in-ten chance of a later frost.
Nearby and next
- New York climateThe statewide normals and every place in the state
- Matamoras, PA1 miles from this station, 48.3°F a year
- Middletown, NY14 miles from this station, 49.7°F a year
- Sussex, NJ14 miles from this station, 50.1°F a year
- Rock Hill, NY14 miles from this station, 46.0°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made