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Lafayette, Indiana 7 Day Weather Forecast
Wx Forecast - Wx Discussion - Wx Aviation
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NWS Forecast for Lafayette IN
National Weather Service Forecast for:
Lafayette IN
Issued by: National Weather Service Indianapolis, IN |
| Updated: 4:45 pm EDT Jul 14, 2026 |
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Tonight
 Mostly Clear
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Wednesday
 Hot
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Wednesday Night
 Mostly Clear
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Thursday
 Mostly Sunny then Chance Showers
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Thursday Night
 Chance Showers then Partly Cloudy
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Friday
 Chance T-storms then T-storms Likely
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Friday Night
 T-storms Likely then Slight Chance T-storms
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Saturday
 Chance T-storms
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Saturday Night
 Chance T-storms
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| Lo 69 °F |
Hi 93 °F |
Lo 72 °F |
Hi 92 °F |
Lo 72 °F |
Hi 89 °F |
Lo 71 °F |
Hi 89 °F |
Lo 71 °F |
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Heat Advisory
Air Quality Alert
Tonight
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Mostly clear, with a low around 69. Calm wind. |
Wednesday
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Sunny and hot, with a high near 93. Heat index values as high as 101. Calm wind. |
Wednesday Night
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Mostly clear, with a low around 72. Calm wind. |
Thursday
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A 30 percent chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 92. Heat index values as high as 100. Calm wind. |
Thursday Night
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A 30 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 72. Calm wind. |
Friday
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Showers and thunderstorms likely, mainly after 2pm. Mostly sunny, with a high near 89. Calm wind becoming southwest around 5 mph in the afternoon. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible. |
Friday Night
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Showers and thunderstorms likely, mainly before 8pm. Mostly cloudy, with a low around 71. Southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%. |
Saturday
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A 30 percent chance of showers and thunderstorms, mainly after 2pm. Mostly sunny, with a high near 89. Light west southwest wind increasing to 5 to 9 mph in the morning. |
Saturday Night
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A 30 percent chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 71. West southwest wind 5 to 8 mph. |
Sunday
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Mostly sunny, with a high near 87. Northwest wind 3 to 6 mph. |
Sunday Night
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Partly cloudy, with a low around 69. |
Monday
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A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 87. |
Monday Night
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A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 69. |
Tuesday
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A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 84. |
Forecast from NOAA-NWS
for Lafayette IN.
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Weather Forecast Discussion
950
FXUS63 KIND 141841
AFDIND
Area Forecast Discussion
National Weather Service Indianapolis IN
241 PM EDT Tue Jul 14 2026
.KEY MESSAGES...
- Generally dry weather and a steady warming trend mid to late week
- Peak heat indices around to slightly above 100 degrees each
afternoon mid-late week
- Chances for showers and storms return Friday through the weekend,
primarily during the afternoon and evening
&&
.DISCUSSION (This evening through Tuesday)...
Issued at 239 PM EDT Tue Jul 14 2026
Much of the upper level pattern over the next 7 days will be
dominated by a broad ridge across the CONUS. This ridge will remain
persistent as a Rex Block forms today and tomorrow, keeping the
ridge axis locked over the central US. In return, generally warmer
than normal conditions are expected across the central and eastern
US with subtle surface condition changes depending on low level
features.
For today and tomorrow, central Indiana will be situated on the
periphery of a weak cutoff low to the south and a closed high to the
north. This will place a very weak confluence boundary just to our
south and mainly subsidence along and north of the I-70 corridor. In
return, slightly warmer temperatures are expected closer to the
surface high pressure, and thus heat index values will likely near
and potentially exceed 100 for both Wednesday and Thursday.
Within this high pressure, stagnant air will also lead to greater
ozone in the PBL, and therefor lower air quality.
As we approach the weekend, the surface high to the north will begin
to break down, allowing for weak mid level moisture return. This
will lead to destabilization each afternoon Friday through Sunday
with diurnal showers and thunderstorms likely. Friday will likely
have the greatest coverage of thunderstorms as a shortwave will
induce a narrow, weak LLJ. A few organized clusters may form out of
this weak LLJ on Friday with a low risk for damaging wind gusts, but
otherwise severe weather is not expected over the weekend.
&&
.AVIATION (18Z TAF Issuance)...
Issued at 121 PM EDT Tue Jul 14 2026
Impacts:
- BCFG with 3SM VIS at KLAF between 09-12Z
Discussion:
VFR conditions are expected through the period except for a brief
period of BCFG at KLAF tomorrow morning.
A smoke layer is likely to linger aloft today and tonight,
highlighted by the FEW250 group. Winds will be somewhat variable at
KIND and KLAF today through tonight, with KLAF become calm early
tomorrow morning. At the southern sites, winds will remain easterly,
transitioning to variable tomorrow.
&&
.IND WATCHES/WARNINGS/ADVISORIES...
Heat Advisory from noon to 8 PM EDT Wednesday for INZ021-029>031-
036>042-046>049.
&&
$$
AVIATION...Updike
DISCUSSION...Updike
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