Allendale, New Jersey Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Allendale weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Overcast35%—94°73°—
- SundayJul 5Heavy Showers53%1.4″87°72°-7°
- MondayJul 6Drizzle93%0.03″75°68°-12°
- TuesdayJul 7Heavy Drizzle84%0.06″68°61°-7°
- WednesdayJul 8Overcast23%—82°60°+14°
- ThursdayJul 9Overcast10%—90°66°+8°
- FridayJul 10Light Drizzle52%—85°67°-5°
AQI 82 (Moderate), driven by Ozone. AQI up 36 in the last 6 hours — air quality is degrading. Ozone at AQI 58 — peak already passed at 1 PM under clear skies. Levels should ease through evening.
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 58 — peak already passed at 1 PM under clear skies. Levels should ease through evening.
- Present
- AQI 58
- UV peak
- 0.6 at earlier today
- Sky at peak
- clear
- Projected peak
- AQI 58
PM × Wind × Precip
PM2.5 at 5.8 µg/m³, PM10 at 6.2 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.94
- Wind
- light
- Recent rain
- 0h in last 6h
- Pattern
- background
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).
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
- Moonrise
- 10:52 PM
- Moonset
- 9:59 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Allendale at a glance
- Today vs. normal: 23°F above the seasonal normal for this latitude
- Last frost: April 22 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 07401
16-Day Forecast — Allendale
- Sat94°73°35%
- Sun87°72°53%
- Mon75°68°93%
- Tue68°61°84%
- Wed82°60°23%
- Thu90°66°10%
- Fri85°67°52%
- Sat84°71°31%
- Sun81°66°27%
- Mon77°63°24%
- Tue83°65°21%
- Wed87°60°28%
- Thu89°64°41%
- Fri92°67°45%
- Sat91°69°34%
- Sun90°71°39%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of July 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 — Allendale
SPC has placed Allendale in the Slight Risk category for severe thunderstorms today.
- TODAYSLGTSlight Risk
- TOMORROWMRGLMarginal Risk
- DAY 3TSTMGeneral Thunderstorms
Scattered severe storms possible. A few tornadoes, hail, and damaging wind gusts possible.
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.
Microseason · July 1–5
Cicadas claim the afternoon
Annual cicada buzz begins, peaking in the heat of the day.
Day 185 of 365 · Wedge 37 of 72
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
Allendale's warmest month is July (~75°F mean) and its coldest is January (~28°F). Rainfall peaks in December (4.3 inches) and bottoms out in February (3.0 inches).
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 28° | 3.6″ | 14 |
| February | 30° | 3.0″ | 13 |
| March | 38° | 3.7″ | 16 |
| April | 50° | 4.2″ | 17 |
| May | 59° | 4.2″ | 18 |
| June | 68° | 4.3″ | 17 |
| July | 75° | 4.0″ | 17 |
| August | 74° | 4.3″ | 17 |
| September | 67° | 3.9″ | 14 |
| October | 56° | 3.5″ | 12 |
| November | 43° | 4.1″ | 13 |
| December | 33° | 4.3″ | 14 |
Regional context
Allendale swings from 28°F in January to 75°F in July (47°F) per NOAA NCEI 1991-2020 normals; precipitation in Allendale runs about 47 inches on roughly 183 measurable days.
No season owns Allendale's rain: December reaches 4.3 inches across 13.6 days and February keeps 3.0 inches on 13.3, an even spread through Allendale's year. It is a balanced pattern Allendale shares with places like Waldwick, NJ, Ramsey, NJ and Saddle River, NJ.
Allendale reaches its last hard frost near mid-April; that is the cue for kale, peas, spinach, and parsnips. Heat-demanding starts go out a fortnight on in Allendale, after the soil warms and cold snaps clear. By mid-November, frost is back in Allendale — protect or harvest anything tender. Allendale's low ground holds frost later into spring than Allendale's benches, which run 3-5 days ahead.
Similar climates: Waldwick, NJ, Ramsey, NJ, Saddle River, NJ, Midland Park, NJ, Upper Saddle River, NJ.
Frequently asked
- When does it freeze in Allendale?
- In Allendale, expect the last spring frost near mid-April; Allendale's first autumn frost comes around mid-November.
- What is the rainy season in Allendale?
- Rainfall in Allendale peaks in December near 4.3 inches, out of about 47 inches annually.
- What is the warmest month in Allendale?
- July is Allendale's warmest month, averaging about 75°F.
- What is the coldest month in Allendale?
- Allendale bottoms out in January, with a mean near 28°F.
- When can I start a vegetable garden in Allendale?
- Time tomatoes in Allendale for two weeks after mid-April; peas and greens start at Allendale's frost line.
- How many rainy days does Allendale get?
- Allendale records around 183 days of measurable precipitation annually.
- What hardiness zone is Allendale?
- Allendale's hardiness zone tracks its winter low; with January near 28°F, check the USDA ZIP map for the exact zone.
- What is the 10-day forecast for Allendale?
- Allendale's extended outlook — daily high and low temperatures and precipitation chances for each upcoming day — is in the daily forecast above.
- Will it rain this week in Allendale?
- See this week's day-by-day rain chances for Allendale in the daily forecast above, and the next 24 hours in the hourly chart.
- What is the weather like right now in Allendale?
- Current conditions for Allendale and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
- How often is the Allendale forecast updated?
- The Allendale forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
- When are sunrise and sunset in Allendale?
- Today's sunrise and sunset times for Allendale are in the Almanac section above, along with civil dawn, civil dusk, and day length. Day length is longest near the summer solstice and shortest near the winter solstice.
- How accurate is the weather forecast for Allendale?
- The next few days in Allendale's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.
Climate
Allendale, New Jersey has a warm-summer humid continental climate: January averages roughly 28°F, July about 75°F, 47°F between them.
In a typical year Allendale records about 47 inches of precipitation on around 183 days.
Latitude 41.0°N gives Allendale its 47°F swing, and with it the rhythm of Allendale's growing season.
ZIP codes in Allendale
- 07401