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Boyd, IL Weather Forecast

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Partly Cloudy

102°F

Updated	4:04 pm
Feels Like	106°F
Humidity	31%
Wind	NW 12 mph
Barometer	29.89 in
Dew Point	66°F

Partly Cloudy

39°C

Updated	4:04 pm
Feels Like	41°C
Humidity	31%
Wind	NW 19 km/h
Barometer	101.2 kPa
Dew Point	19°C

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Cloud Cover	13%
uv UV Index	8
Sunrise	6:28 AM
Sunset	7:19 PM
Moonrise	7:00 PM
Moonset	3:50 PM

Civil Twilight
5:59 AM to 6:26 AM
7:20 PM to 7:47 PM
Boyd IL Weather - Waning Crescent Moon

Waning Crescent Moon

Boyd Weather Forecast

TONIGHT	SUNDAY	SUNDAY NIGHT	LABOR DAY	MONDAY NIGHT	TUESDAY	WEDNESDAY	WEDNESDAY NIGHT	THURSDAY	THURSDAY NIGHT	FRIDAY	SATURDAY

Clearing	Sunny	Mostly Clear	Sunny	Mostly Clear	Mostly Clear	Mostly Clear	Chance of Showers	Chance of Showers	Partly Cloudy	Partly Cloudy	Sunny
Lo: 71°FLo: 22°C	Hi: 91°FHi: 33°C	Lo: 61°FLo: 16°C	Hi: 90°FHi: 32°C	Lo: 65°FLo: 18°C	Hi: 99°FHi: 37°C Lo: 71°FLo: 22°C	Hi: 99°FHi: 37°C Lo: 71°FLo: 22°C	Lo: 71°FLo: 22°C	Hi: 89°FHi: 32°C	Hi: 89°FHi: 32°C Lo: 65°FLo: 18°C	Hi: 89°FHi: 32°C Lo: 65°FLo: 18°C	Hi: 91°FHi: 33°C
							POP: 30%	POP: 40%

POP = Probability of Precipitation.

Weather Outlook Updated: 327 PM CDT Sat Sep 05 2026 Boyd, IL Weather - WeatherWorld.com

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Meteorlogic Glosserator
Instant definitions for any meteorological term.

Issued: 330 PM CDT Sat Sep 5 2026

Key Messages

An Extreme Heat Warning remains in effect for the whole area through 8 PM tonight. A Heat Advisory is in effect for the western four SEMO counties along with Stoddard, New Madrid, and Fulton counties from 8 PM tonight through 8 PM tomorrow night.
Isolated to scattered showers and thunderstorms will be possible throughout the Quad State this afternoon and evening. Gusty winds, lightning and brief heavy downpours will be the primary concerns.
Labor Day will be the choice day of the wee...

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Weather 101: Term of the Day

Boundary Layer

In general, a layer of air adjacent to a bounding surface. Specifically, the term most often refers to the planetary boundary layer, which is the layer within which the effects of friction are significant. For the earth, this layer is considered to be roughly the lowest one or two kilometers of the atmosphere. It is within this layer that temperatures are most strongly affected by daytime insolation and nighttime radiational cooling, and winds are affected by friction with the earth's surface. The effects of friction die out gradually with increasing height, so the "top" of this layer cannot be defined exactly. There is a thin layer immediately above the earth's surface known as the surface boundary layer (or simply the surface layer). This layer is only a portion of the planetary boundary layer, and represents the layer within which friction effects are more or less constant throughout (as opposed to decreasing with height, as they do above it). The surface boundary layer is roughly 10 meters thick (from the surface up to 10 m above the ground), but again the exact depth is indeterminate. Like friction, the effects of insolation and radiational cooling are strongest within this layer.