Weather in Allendale, New Jersey
Roses open along the stoops. Day 59 of spring. Read this microseason across nine climate regions →
- TodayMay 16Overcast—81°48°
- SundayMay 17Overcast—89°61°
- MondayMay 18Light Drizzle—86°64°
- TuesdayMay 19Overcast10%94°64°
- WednesdayMay 20Light Showers65%91°57°
- ThursdayMay 21Overcast28%70°48°
- FridayMay 22Drizzle20%64°48°
- PM 2.5
- 11.0 μg/m³
- PM 10
- 12.2 μg/m³
- NO₂
- 19.2 μg/m³
- Ozone
- 106.0 μg/m³
- UV Index
- 0.0 Low
When the dew is on the grass, rain will never come to pass.
- Moonrise
- 9:40 AM
- Moonset
- 12:36 AM
- In sign
- ♉︎ Taurus
Roses open along the stoops
Allendale at a glance
- Today vs. normal: 72°F — typical for the season
- Last frost: April 22 (climatological average for this latitude)
- Microseason: 28 of 72, May 16–20
- Planting window: Direct sow okra, melons, and southern peas. Thin carrot rows.
Right now in the garden
Warm-season window is open
As of May 17, the last spring frost has passed for most years. Transplant tomatoes, peppers, eggplants, basil, and cucurbits (cucumbers, squash, melons) now. Direct-sow beans and corn into warm soil.
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 (~76°F mean) and its coldest is January (~31°F). Rainfall peaks in August (4.5 inches) and bottoms out in February (2.5 inches).
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 31° | 3.0″ | 6 |
| February | 33° | 2.5″ | 5 |
| March | 40° | 4.1″ | 6 |
| April | 51° | 3.7″ | 7 |
| May | 62° | 3.4″ | 7 |
| June | 70° | 4.3″ | 8 |
| July | 76° | 4.3″ | 6 |
| August | 74° | 4.5″ | 7 |
| September | 66° | 3.7″ | 6 |
| October | 55° | 4.0″ | 6 |
| November | 44° | 3.3″ | 6 |
| December | 35° | 4.0″ | 7 |
Regional context
Allendale sits within a warm-summer humid continental climate region — a cohort that shares similar temperature ranges, seasonal patterns, and growing conditions across nearby cities.
Similar climates: Trenton, NJ, Newark, NJ, Jersey City, NJ, Paterson, NJ, Elizabeth, NJ.
Frequently asked
- When does it freeze in Allendale?
- Allendale's last spring frost typically falls around mid-April, and the first fall frost arrives around mid-November.
- What is the rainy season in Allendale?
- August is the wettest month with about 4.5 inches of rain on average; the city receives roughly 45 inches annually.
- What is the warmest month in Allendale?
- July is typically warmest, averaging about 76°F.
- What is the coldest month in Allendale?
- January is typically coldest, averaging about 31°F.
- When can I start a vegetable garden in Allendale?
- 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 Allendale get?
- Allendale averages about 77 rainy days per year.
- What hardiness zone is Allendale?
- Allendale'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
Allendale, New Jersey sits in a warm-summer humid continental climate zone. January means hover near 31°F while July averages 76°F — a 45°F seasonal swing.
Across the year, Allendale receives about 45 inches of precipitation spread over roughly 77 rainy days.
The rhythm of the year is set by latitude (41.0°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.