Bound Brook, United States experiences average highs of 18°C (64°F) and lows of 9°C (48°F) throughout the year. Rainfall is moderate, averaging about 10 rainy days per month. Average highs have cooled by 0.9°C (1.6°F) across the available records.
Bound Brook, United States Weather & Climate 2026
Monthly climate averages for Bound Brook, United States. Based on 10-year ERA5 reanalysis data.
Climate Overview
Drier season: Jan–Dec 
Wetter season: Apr–Aug At-a-Glance Climate Summary
Live Weather & Air Quality
Key figures
Climate Score
5.4/10
Best: May, June, August, September, October
UV Index
5
Low
Temperature 18°C / 9°C
Feels Like 16°C / 7°C
Rainy Days 10
Rainfall 99 mm
Sunshine 8 h
Humidity 70%
Wind Speed 16 km/h
Dew Point 8°C
Snow Days 3 days
Frost Days 12 days
Hottest Month
30°C
July
Avg Low21°C
Rain14days
Coldest Month
-2°C
January
Avg High5°C
Rain9days
Driest Month
8days
October
Avg High19°C
Avg Low11°C
Windiest Month
19 km/h
March (Gusts 45)
Worst Time to Visit
Consider avoiding January, February, December due to very cold temperatures.
Sun Position
Sunrise 05:28
Daylight 15.1h
Sunset 20:32
Live conditions—
Bound Brook on the map · live conditions
Bound Brook, United States
- Continent
- Americas
- Country
- United States
- City
- Bound Brook
- Population
- 10.5K
- Elevation
- 14 m
- Coordinates
- 40.57°, -74.54°
Seasonal Breakdown
Spring
Mar–May
Avg High 17°C
Avg Low 7°C
Rain 11 days/mo
1/3 best months
Summer
Jun–Aug
Avg High 29°C
Avg Low 20°C
Rain 12 days/mo
2/3 best months
Autumn
Sep–Nov
Avg High 19°C
Avg Low 11°C
Rain 8 days/mo
2/3 best months
Winter
Dec–Feb
Avg High 6°C
Avg Low -1°C
Rain 9 days/mo
Climate Charts
Based on historical averages (2016–2025)
Monthly Temperatures
HighLowShaded bands show the typical range across the available yearly records.
Line chart showing monthly temperatures. Jan: 5°C / -2°C . Feb: 7°C / -1°C . Mar: 11°C / 2°C . Apr: 17°C / 7°C . May: 22°C / 12°C . Jun: 27°C / 18°C . Jul: 30°C / 21°C . Aug: 29°C / 20°C . Sep: 25°C / 17°C . Oct: 19°C / 11°C . Nov: 12°C / 4°C . Dec: 7°C / 0°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 85 mm. Feb: 91 mm. Mar: 103 mm. Apr: 104 mm. May: 112 mm. Jun: 88 mm. Jul: 130 mm. Aug: 102 mm. Sep: 91 mm. Oct: 99 mm. Nov: 75 mm. Dec: 102 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 66%. Feb: 68%. Mar: 65%. Apr: 66%. May: 72%. Jun: 69%. Jul: 72%. Aug: 72%. Sep: 73%. Oct: 72%. Nov: 68%. Dec: 71%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 18 km/h . Feb: 18 km/h . Mar: 19 km/h . Apr: 18 km/h . May: 16 km/h . Jun: 15 km/h . Jul: 13 km/h . Aug: 13 km/h . Sep: 14 km/h . Oct: 16 km/h . Nov: 17 km/h . Dec: 17 km/h .
Sunshine
Sunshine
Sunshine: Jan: 6h. Feb: 7h. Mar: 8h. Apr: 9h. May: 9h. Jun: 11h. Jul: 12h. Aug: 10h. Sep: 9h. Oct: 7h. Nov: 7h. Dec: 6h.
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 2. Feb: UV 3. Mar: UV 5. Apr: UV 5. May: UV 6. Jun: UV 7. Jul: UV 7. Aug: UV 7. Sep: UV 5. Oct: UV 4. Nov: UV 3. Dec: UV 2.
Monthly Daylight Hours
Daylight12h reference
Monthly Dew Point & Comfort
Dew Point Dry Comfortable Humid Muggy Oppressive
Snow Days
Snow DaysSnowfall
Snow Days: Jan: 5 days. Feb: 6 days. Mar: 3 days. Apr: 1 days. May: 0 days. Jun: 0 days. Jul: 0 days. Aug: 0 days. Sep: 0 days. Oct: 0 days. Nov: 1 days. Dec: 4 days.
Climate Trends
Average highs have cooled by 0.9°C (1.6°F) across the available records. Average rainfall has remained broadly steady.
2016 to 2025
Avg high Avg rainfall
Climate summary
| Last 12 months | All years | |
|---|---|---|
| Hottest month | Jul 2025 · 31°C | Jul · 30°C |
| Coldest month | Jan 2025 · -4°C | Jan · -2°C |
| Wettest month | May 2025 · 154 mm | Jul · 130 mm |
| Windiest month | Mar 2025 · 21 km/h | Mar · 19 km/h |
Month-by-Month Weather Table
January
Poor 
February
Poor March
Poor April
Fair May best
Excellent June best
Excellent July
Fair August best
Good September best
Excellent October best
Good November
Fair December
Poor | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 5°C / -2°C | 1°C / -7°C | 9days (85 mm) Wet | 6h Fair | 66% Muggy | 2.4 Moderate | Poor | View Details |
| February | 7°C / -1°C | 3°C / -6°C | 9days (91 mm) Wet | 6.7h Fair | 68% Muggy | 3.4 Moderate | Poor | View Details |
| March | 11°C / 2°C | 8°C / -2°C | 10days (103 mm) Wet | 8h Good | 65% Muggy | 4.7 Moderate | Poor | View Details |
| April | 17°C / 7°C | 15°C / 4°C | 11days (104 mm) Wet | 8.7h Good | 66% Muggy | 5.3 High | Fair | View Details |
| May best | 22°C / 12°C | 22°C / 11°C | 13days (112 mm) Wet | 9.2h Good | 72% Muggy | 6.2 High | Excellent | View Details |
| June best | 27°C / 18°C | 29°C / 18°C | 11days (88 mm) Wet | 11.1h Excellent | 69% Muggy | 6.9 High | Excellent | View Details |
| July | 30°C / 21°C | 33°C / 24°C | 14days (130 mm) Wet | 11.5h Excellent | 72% Muggy | 7.3 Very High | Fair | View Details |
| August best | 29°C / 20°C | 31°C / 22°C | 11days (102 mm) Wet | 10.3h Excellent | 72% Muggy | 6.6 High | Good | View Details |
| September best | 25°C / 17°C | 26°C / 17°C | 9days (91 mm) Wet | 8.5h Good | 73% Muggy | 5 Moderate | Excellent | View Details |
| October best | 19°C / 11°C | 18°C / 10°C | 8days (99 mm) Wet | 7.3h Good | 72% Muggy | 4.2 Moderate | Good | View Details |
| November | 12°C / 4°C | 9°C / 1°C | 8days (75 mm) Wet | 7h Good | 68% Muggy | 2.9 Moderate | Fair | View Details |
| December | 7°C / 0°C | 3°C / -4°C | 10days (102 mm) Wet | 5.7h Fair | 71% Muggy | 2 Low | Poor | View Details |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit Bound Brook are May, June, August, September, October, when temperatures are comfortable and rainfall is at its lowest. This is based on 10-year climate averages for Bound Brook, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in Bound Brook is July, with average daytime highs of 30°C (87°F). Plan outdoor activities for early morning or late afternoon if visiting during this period.
The coldest month in Bound Brook is January, with average overnight lows of -2°C (28°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in Bound Brook is July, averaging 130mm of precipitation across 14 rainy days. An umbrella or waterproof jacket is essential.
The rainy season in Bound Brook runs through July, May, April, June, with the heaviest rainfall in July. Based on 10-year averages for Bound Brook.
Bound Brook receives approximately 100 sunshine hours per year. The sunniest month is July with around 12 hours. Based on climate data for Bound Brook.
The least favorable months to visit Bound Brook are January, February, December, primarily due to very cold temperatures. For the best conditions, consider May, June, August, September, October instead.
The annual average UV index in Bound Brook is 5, classified as moderate. Standard sun protection (sunscreen, hat) is recommended during prolonged outdoor exposure.
Average humidity in Bound Brook is 70%, classified as moderate. Humidity levels are generally comfortable and should not affect outdoor activities for most people.
Yes, Bound Brook receives snow. Months with snowfall average 3 snow days and 9 cm (4 in) of accumulation, with about 12 frost days during winter.
Average wind speeds in Bound Brook are 16 km/h (10 mph). The windiest month is March with peak winds reaching 19 km/h (12 mph) (gusts up to 45 km/h / 28 mph).
Bound Brook averages 4 clear-sky days per month with overall cloud cover around 58%. The clearest skies occur in October.
The annual average dew point in Bound Brook is 8°C (46°F), which feels dry and comfortable. Outdoor activities are comfortable year-round from a humidity standpoint.
Bound Brook has a Humid Subtropical climate, classified as Cfa under the Köppen system. Temperate climates have mild winters and warm summers, with rainfall spread across the year and four distinct seasons.
The 'feels like' temperature in Bound Brook ranges from 7°C (45°F) to 16°C (61°F) on average. The 'feels like' temperature closely matches the actual temperature throughout most of the year.
Yes, June is a great time to visit Bound Brook. It earns a climate score of 8.5/10 with Excellent.
For June in Bound Brook, pack Umbrella, Waterproof jacket, Breathable clothing, Sunscreen (SPF 30+), Sun hat. With average highs of 27°C (81°F) and 11 rainy days, these essentials will keep you comfortable.
Data Source
Climate data derived from ERA5 reanalysis (ECMWF), averaged over 2016–2025. Sea surface temperature from marine reanalysis data. Climate scores and seasonal estimates are computed by WorldStats.
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