Weather forecast for tomorrowMerrillville, IN
Weather forecast for tomorrow
Sunday Oct 18, 2026
- 64°F
- 37°F
Sunny
- Precip. probability: 3%
- Precipitation: 0"
- Wind: 13mphSSW 200°
- Humidity: 48%
- UV index: 4
- Sunrise: 7:04 am CDT
- Sunset: 6:03 pm CDT
- details ▼
Tomorrow, in Merrillville, the forecast calls for abundant sunshine.
Temperature readings will span from a daytime high of an enjoyable 64.4°F to a night low of an icy 37.4°F.
October's usual high of 61.3°F is forecasted to be matched by the day’s maximum temperature.
Sunrise will be at 7:04 am and sunset at 6:03 pm; tomorrow's daylight will last for 10h and 59min.
Temperature readings will span from a daytime high of an enjoyable 64.4°F to a night low of an icy 37.4°F.
October's usual high of 61.3°F is forecasted to be matched by the day’s maximum temperature.
Sunrise will be at 7:04 am and sunset at 6:03 pm; tomorrow's daylight will last for 10h and 59min.
Hourly overview
Hourly temperatures
Warmest hour: 3 pm 64°C.
Coldest period: 3 am - 6 am 39°C.
Coldest period: 3 am - 6 am 39°C.
Chance of precipitation
Highest chance: 3 am - 6 am 4%.
Hourly weather forecast
- 12 am
- 41°F
- Feels like:37°F
Clear
- Precip. probability: 3%
- Precipitation: 0"
- Wind: 5mphSSW 198°
- Humidity: 81%
- Pressure: 30.45"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 2 am
- 41°F
- Feels like:37°F
Clear
- Precip. probability: 4%
- Precipitation: 0"
- Wind: 5mphSSW 193°
- Humidity: 84%
- Pressure: 30.47"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 4 am
- 39°F
- Feels like:36°F
Clear
- Precip. probability: 4%
- Precipitation: 0"
- Wind: 6mphSSW 194°
- Humidity: 84%
- Pressure: 30.47"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 6 am
- 39°F
- Feels like:34°F
Clear
- Precip. probability: 4%
- Precipitation: 0"
- Wind: 6mphSSW 195°
- Humidity: 84%
- Pressure: 30.47"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
Sunrise: 7:04 am
- 8 am
- 41°F
- Feels like:37°F
Sunny
- Precip. probability: 2%
- Precipitation: 0"
- Wind: 7mphSSW 197°
- Humidity: 77%
- Pressure: 30.47"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 10 am
- 52°F
- Feels like:48°F
Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 11mphSSW 200°
- Humidity: 51%
- Pressure: 30.47"Hg
- Visibility: 10mi
- UV index: 2
- details ▼
- 12 pm
- 59°F
- Feels like:57°F
Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 12mphSSW 203°
- Humidity: 38%
- Pressure: 30.45"Hg
- Visibility: 10mi
- UV index: 4
- details ▼
- 2 pm
- 63°F
- Feels like:61°F
Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 12mphSSW 205°
- Humidity: 34%
- Pressure: 30.42"Hg
- Visibility: 10mi
- UV index: 3
- details ▼
- 4 pm
- 63°F
- Feels like:63°F
Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 11mphSSW 198°
- Humidity: 34%
- Pressure: 30.39"Hg
- Visibility: 10mi
- UV index: 1
- details ▼
- 6 pm
- 57°F
- Feels like:55°F
Sunny
- Precip. probability: 0%
- Precipitation: 0"
- Wind: 8mphS 183°
- Humidity: 45%
- Pressure: 30.36"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
Sunset: 6:03 pm
- 8 pm
- 52°F
- Feels like:50°F
Clear
- Precip. probability: 1%
- Precipitation: 0"
- Wind: 6mphS 182°
- Humidity: 57%
- Pressure: 30.39"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
- 10 pm
- 48°F
- Feels like:46°F
Clear
- Precip. probability: 2%
- Precipitation: 0"
- Wind: 6mphS 189°
- Humidity: 66%
- Pressure: 30.39"Hg
- Visibility: 10mi
- UV index: 0
- details ▼
Tomorrow, sunshine is expected.
The temperature will be between a minimum of 39.2°F and a maximum of 64.4°F. The warmest part of the day will be around 3 pm.
The temperature tomorrow will be similar to the average high in October. The minimum temperature will be more similar to November's average low of 35.2°F than October's typical 47.1°F.
The temperature will be between a minimum of 39.2°F and a maximum of 64.4°F. The warmest part of the day will be around 3 pm.
The temperature tomorrow will be similar to the average high in October. The minimum temperature will be more similar to November's average low of 35.2°F than October's typical 47.1°F.
Updated: Oct 17, 2026 @ 15:36:15 UTC
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate
Frequently asked questions
On Sunday, skies are expected to be clear and full of sunshine.
Tomorrow, the maximum temperature in Merrillville will be 64.4°F, while the minimum temperature will be 37.4°F.
Tomorrow, the maximum temperature will be in line with the average highest temperature in October. The lowest temperature will be uncommonly lower than the average low of 47.1°F.
Tomorrow, the maximum temperature will be in line with the average highest temperature in October. The lowest temperature will be uncommonly lower than the average low of 47.1°F.
On Sunday, in Merrillville, sunrise will be at 7:04 am and sunset at 6:03 pm (CDT).
In Merrillville, tomorrow, there will be 10h and 59min of daylight.
