If you’re standing on the corner of Broad Street and Liberty in the middle of January, looking at your phone and seeing it’s 38°F, you might think, "Not too bad." You’d be wrong. In Bloomfield, New Jersey, the numbers on the screen are a bit of a tease. Between the humidity rolling off the Passaic River and the wind tunnels created by the town’s mix of historic brick buildings and modern apartments, the actual temperature in Bloomfield New Jersey feels like a different beast entirely.
It’s currently mid-January 2026, and we are right in the thick of the "gray months." Today, the high is hovering around 51°F, which is actually a bit of a fluke—usually, we're lucky to crack 40°F this time of year. But that's the thing about Bloomfield weather. It’s inconsistent. One day you’re wearing a heavy wool coat from the local thrift shop, and the next, you’re wondering if you can get away with just a hoodie while grabbing a bagel.
The Seasonal Reality: Beyond the Averages
Honestly, most people just look at a chart and see that July is the hottest month (average high of 85°F) and January is the coldest (average low of 25°F). But that’s a surface-level take. If you live here, you know that the transition months—April and October—are where the real drama happens.
In April, the temperature in Bloomfield New Jersey is basically a coin toss. You might get a gorgeous 65°F afternoon where everyone flocks to Brookdale Park, followed by a 35°F night that kills every tulip someone was brave enough to plant early. The humidity starts creeping up too. By May, the dew point begins its slow climb, making those 70-degree days feel a lot stickier than the same temperature would feel out west.
Summer: The Concrete Heat Island
When July hits, Bloomfield can feel like a furnace. Because we are so close to Newark and New York City, we deal with the "urban heat island" effect. Brick stores and asphalt parking lots soak up the sun all day and then radiate it back out at night.
- July Highs: Frequently hit 85°F to 90°F.
- The "Feels Like" Factor: With humidity often over 65%, that 85°F easily feels like 95°F.
- Nighttime Relief: Non-existent. Lows stay around 68°F, but the air feels heavy.
I’ve spent summers here where the air is so thick you feel like you’re wearing it. It’s not just the heat; it’s the lack of breeze. Unless a thunderstorm rolls through—which happens about 25 to 30 times a year in this part of Jersey—the air just sits there.
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Winter: Why the Wind Chill is Your Real Enemy
January is technically the coldest month, but February is often the meanest. While the average high is around 39°F, the wind speed in Bloomfield tends to peak in the winter, averaging about 13 mph. That doesn’t sound like much until you’re walking against a northwest wind that’s cutting right through your layers.
Last year, in 2025, we saw some weird extremes. We had days where it didn't even hit 20°F, followed by a week of "false spring" in late February where it hit 55°F. This volatility is why the temperature in Bloomfield New Jersey is a constant topic of conversation at the diner. You can't trust the season to behave.
Breaking Down the Monthly Numbers (The Realistic Version)
Let’s look at what you’re actually dealing with month-to-month. This isn't a perfect science because, well, it's Jersey.
January starts cold and stays that way, with a mean temperature of about 34°F. It’s the windiest time of year. By March, you see a jump to 43°F, but it's often the wettest-feeling month because of the "slop"—that lovely mix of melting snow and cold rain.
May is actually one of the wettest months statistically, bringing about 5.5 inches of rain. This keeps the temperature in Bloomfield New Jersey somewhat moderated, keeping the highs around 71°F before the summer bake begins.
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September is the sleeper hit. Most people think summer is over, but the average high is still 75°F. It’s actually one of the most comfortable times to be outside because the "swelter" of August has finally broken. The humidity drops, the sky turns that specific shade of "Jersey Blue," and the temperature is just right for light jackets.
What Most People Get Wrong About Jersey Weather
A huge misconception is that being "inland" means we escape the coastal weirdness. We don't. While we aren't on the beach, we are firmly in the Northern Climate Zone. This means we get the "Nor’easters" that track up the coast. These storms can dump two feet of snow or three inches of rain while swinging the temperature 20 degrees in six hours.
Another thing? The micro-climates. If you’re down by the Watsessing area, it often feels a couple of degrees cooler than the more paved-over sections of town. Trees matter. Shade matters.
Actionable Advice for Handling Bloomfield’s Temps
If you’re moving here or just visiting, forget the "average" temperature.
First, invest in a high-quality "transitional" jacket. You’ll use it more than your heavy parka. From late September through November, and again from March through May, the temperature in Bloomfield New Jersey fluctuates so much that you need layers you can shed by noon.
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Second, watch the dew point, not just the degrees. In the summer, if the dew point is over 65, stay inside or find a spot with high-velocity AC. The temperature might only say 82°F, but your body won't be able to cool itself down.
Third, prepare for the "April Frost." Don't put your sensitive plants outside until after Mother’s Day. I know the 70-degree day in mid-April is tempting. Don't do it. The temperature will drop to 30°F at 3:00 AM just to spite you.
Check the local Essex County Airport (KCDW) station for the most accurate local readings. It’s only a few miles away and gives a much better picture than the general "New York City" forecast you see on most apps. If they say a cold front is coming through the valley, believe them.
The best way to stay ahead of the weather here is to check the hourly forecast every single morning. In Bloomfield, the "daily high" is often just a brief peak, and the "daily low" is a fleeting moment at dawn. The 10 hours in between are where you actually live your life, and those are the hours that require three different outfits.