Monticello, New York Weather
Fireflies rise from the lawn. Day 77 of spring. Read this microseason across nine climate regions →
Monticello weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 4Overcast——79°50°—
- FridayJun 5Overcast——84°59°+5°
- SaturdayJun 6Light Showers40%0.09″82°61°-2°
- SundayJun 7Overcast40%—75°56°-7°
- MondayJun 8Overcast——71°51°-4°
- TuesdayJun 9Overcast——79°47°+8°
- WednesdayJun 10Mostly Clear11%—83°53°+4°
Ozone at AQI 65 now. AQI up 8 over the last 6 hours (gradual rise). With UV 8.3 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 72 by mid-afternoon.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
Ozone × UV × Sky
Ozone at AQI 65 now. With UV 8.3 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 72 by mid-afternoon.
- Present
- AQI 65
- UV peak
- 8.3 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 72
PM × Wind × Precip
PM2.5 at 6.0 µg/m³ (AQI 33) with a 0.98 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.98
- Wind
- light
- Recent rain
- 0h in last 6h
- Pattern
- stagnant smoke
Trends
Seven days of AQI and PM2.5.
Hourly air-quality data from the Copernicus Atmosphere Monitoring Service, charted across the past and next several days. Dashed lines mark the AQI breakpoints at 50 (Good → Moderate) and 100 (Moderate → Unhealthy for Sensitive Groups).
A summer fog for fair, a winter fog for rain.
- Moonrise
- 3:32 AM
- Moonset
- 12:53 PM
- In sign
- ♒︎ Aquarius
Fireflies rise from the lawn
Monticello at a glance
- Today vs. normal: 4°F above the seasonal normal for this latitude
- Last frost: April 26 (climatological average for this latitude)
- Microseason: Jun 1–5
- Planting window: Harvest spring lettuce before it bolts. Sow heat-tolerant greens.
Right now in the garden
Peak growing season
As of June 4, the growing season is at its peak — frost is months away. Continue succession-planting beans and summer squash. Start fall brassicas (broccoli, cabbage, kale) from seed indoors for transplanting in late summer.
SPC Convective Outlook
Storm Prediction Center — Monticello
SPC has placed Monticello in the Marginal Risk category for severe thunderstorms day after tomorrow.
- TODAYNONENo severe risk
- TOMORROWNONENo severe risk
- DAY 3MRGLMarginal Risk
Isolated severe storms possible. Limited threat for hail or damaging wind.
Source: NOAA / NWS Storm Prediction Center categorical convective outlook. Outlooks are re-issued multiple times per day; this page reflects the most recent SPC polygons covering the city’s coordinates.
Planting calendar
| Month | Plant | Harvest |
|---|---|---|
| January | — | — |
| February | — | — |
| March | — | — |
| April | lettuce, peas, spinach, radishes | — |
| May | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash | lettuce, peas, radishes |
| June | tomatoes, peppers, beans, squash | lettuce, peas, radishes |
| July | tomatoes, peppers, beans, squash | tomatoes, beans, summer squash |
| August | — | tomatoes, beans, summer squash |
| September | fall brassicas, garlic (overwinter), carrots | tomatoes, beans, summer squash |
| October | fall brassicas, garlic (overwinter), carrots | winter squash, tomatoes (last) |
| November | — | — |
| December | — | — |
A year in weather
Monticello's warmest month is July (~69°F mean) and its coldest is January (~23°F). Rainfall peaks in October (5.1 inches) and bottoms out in February (3.1 inches).
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 23° | 3.7″ | 8 |
| February | 24° | 3.1″ | 6 |
| March | 32° | 4.1″ | 8 |
| April | 44° | 4.0″ | 7 |
| May | 55° | 4.2″ | 9 |
| June | 64° | 5.0″ | 8 |
| July | 69° | 4.8″ | 8 |
| August | 67° | 4.7″ | 7 |
| September | 60° | 4.8″ | 7 |
| October | 48° | 5.1″ | 7 |
| November | 38° | 3.8″ | 6 |
| December | 28° | 4.6″ | 8 |
Regional context
Monticello's baseline climate, derived from NOAA NCEI 1991-2020 normals at the nearest reporting station, swings from a January mean of 23°F to a July mean of 69°F — a 46°F seasonal arc typical of the mid-latitude bands. Annual precipitation runs about 51.9 inches spread across roughly 89 days with measurable rain or snow each year.
Rainfall stays relatively even across the calendar: October tops out at 5.1 inches across 7.0 days with measurable rain, and February settles around 3.1 inches across 6.0 rainy days — a comparatively narrow seasonal range. The balanced distribution lines Monticello up with places like Kiamesha Lake, NY, Bridgeville, NY and South Fallsburg, NY, all of which run on overlapping storm tracks rather than a single seasonal moisture source.
The frost-sensitive growing window opens around mid-April, when overnight lows reliably clear freezing for cool-season crops like kale, peas, spinach, and parsnips. Warm-soil crops — tomatoes, peppers, eggplant — wait until soil temperatures reach the mid-50s°F, usually two weeks past the last-frost date. The window closes around mid-November, when overnight lows resume dipping below freezing and frost-tender plants need protection or harvest. These are 30-year central tendencies; year-to-year frost dates can move by up to two weeks. Local features matter: a south-facing slope inside Monticello typically runs 3-5 days ahead of the regional last-frost date, while a low-lying lot along a creek or drainage can lag the same date by a week or more on calm clear nights.
Similar climates: Kiamesha Lake, NY, Bridgeville, NY, South Fallsburg, NY, Mongaup Valley, NY, Rock Hill, NY.
Frequently asked
- When does it freeze in Monticello?
- Monticello's last spring frost typically falls around mid-April, and the first fall frost arrives around mid-November.
- What is the rainy season in Monticello?
- October is the wettest month with about 5.1 inches of rain on average; the city receives roughly 52 inches annually.
- What is the warmest month in Monticello?
- July is typically warmest, averaging about 69°F.
- What is the coldest month in Monticello?
- January is typically coldest, averaging about 23°F.
- When can I start a vegetable garden in Monticello?
- Cool-season crops (peas, lettuce) can be sown around the last spring frost (mid-April); warm-season crops (tomatoes, peppers) wait until 1–2 weeks after.
- How many rainy days does Monticello get?
- Monticello averages about 89 rainy days per year.
- What hardiness zone is Monticello?
- Monticello's USDA hardiness zone is determined by its lowest average winter temperature; check the USDA's online lookup with the city ZIP for the current zone designation.
Climate
Monticello, New York sits in a warm-summer humid continental climate zone. January means hover near 23°F while July averages 69°F — a 46°F seasonal swing.
Across the year, Monticello receives about 52 inches of precipitation spread over roughly 89 rainy days.
The rhythm of the year is set by latitude (41.7°N), proximity to large water bodies, and elevation — all of which shape what grows here, when frost is likely, and what the weather story looks like day to day.