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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: 3:23 pm EDT Jun 29, 2026 |
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This Afternoon
 Partly Sunny
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Tonight
 Partly Cloudy
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Tuesday
 Hot
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Tuesday Night
 Clear
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Wednesday
 Hot
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Wednesday Night
 Clear
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Thursday
 Hot
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Thursday Night
 Chance T-storms
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Friday
 Chance T-storms
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| Hi 90 °F |
Lo 75 °F |
Hi 92 °F |
Lo 75 °F |
Hi 94 °F |
Lo 74 °F |
Hi 92 °F |
Lo 74 °F |
Hi 89 °F |
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Heat Advisory
Hazardous Weather Outlook
This Afternoon
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Partly sunny, with a high near 90. Heat index values as high as 102. South southwest wind around 10 mph. |
Tonight
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Partly cloudy, with a low around 75. South southwest wind 6 to 8 mph. |
Tuesday
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Sunny and hot, with a high near 92. Heat index values as high as 103. Southwest wind 7 to 11 mph, with gusts as high as 18 mph. |
Tuesday Night
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Clear, with a low around 75. South southwest wind 6 to 9 mph, with gusts as high as 18 mph. |
Wednesday
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Sunny and hot, with a high near 94. Southwest wind 5 to 8 mph. |
Wednesday Night
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Clear, with a low around 74. South southwest wind around 6 mph. |
Thursday
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Sunny and hot, with a high near 92. Light south southwest wind becoming southwest 5 to 9 mph in the morning. |
Thursday Night
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A 40 percent chance of showers and thunderstorms, mainly after 2am. Partly cloudy, with a low around 74. South southwest wind around 6 mph becoming calm in the evening. |
Friday
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A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 89. Calm wind becoming southwest 5 to 7 mph in the morning. |
Friday Night
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A 40 percent chance of showers and thunderstorms, mainly after 2am. Partly cloudy, with a low around 72. Southwest wind around 5 mph becoming calm in the evening. |
Independence Day
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A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 89. |
Saturday Night
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A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 71. |
Sunday
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A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 87. |
Forecast from NOAA-NWS
for Lafayette IN.
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Weather Forecast Discussion
764
FXUS63 KIND 291857
AFDIND
Area Forecast Discussion
National Weather Service Indianapolis IN
257 PM EDT Mon Jun 29 2026
.KEY MESSAGES...
- Hot and humid condition expected for much of this week with
multiple days in the 90s and heat indices over 100 degrees
- Heat Advisory in effect this afternoon through Thursday
- Thunderstorm chances will increase late week into the holiday
weekend
&&
.DISCUSSION (This evening through Monday)...
Issued at 257 PM EDT Mon Jun 29 2026
Ensemble guidance is in excellent agreement showing anomalous
ridging this week across the Ohio River Valley. Ensemble mean 500mb
heights around 598dm are roughly 2-3 sigma above average for this
time of the year. Ridging remains roughly in place through about
Thursday, before gradually drifting eastward and weakening somewhat.
At the surface, prolonged southerly flow will continue to allow
moisture and warm air to flow northward.
The warm and deeply subsident atmosphere should act to prevent
shower or thunderstorm activity. Compressional heating combined with
modest warm air advection is expected to result in above-normal
warmth this week and likely into this weekend. High temperatures in
the low to middle 90s are probable, with lows in the 70s.
Additionally, dew points in the 70s will contribute to high heat
indices between 100-110 all of this week. A Heat Advisory has been
issued through Thursday evening.
As the ridge gradually drifts eastward later this week, subsidence
weakens allowing for the possibility of daytime / pop-up showers and
thunderstorms beginning on Friday. Severe weather is not currently
expected, since the jet stream is far to our north, but isolated
downbursts can never be ruled out in low-shear situations. Guidance
shows a weak cold front potentially arriving early next week, with
an increased risk of showers/storms. Upper-level flow remains
minimal, however, and organized severe weather does not appear
likely at this time.
&&
.AVIATION (18Z TAF Issuance)...
Issued at 128 PM EDT Mon Jun 29 2026
Impacts:
- Patchy ground fog possible early Tuesday morning
Discussion:
Marginal MVFR ceilings are lifting as temperatures rise. Cloud bases
are now between 3000-3500 feet. Cumulus should ebb and flow between
SCT and BKN this afternoon, dissipating around 00-02z. Cirrus should
be present in some extent into tonight as well.
Winds remain out of the south today around 10kt, decreasing this
evening. Winds may become light enough to allow for some ground fog
at the typically fog-prone terminals. Chances are low, so this will
not be included in the TAFs for now.
Winds become southwesterly on Tuesday after sunrise, increasing to
between 5-10kt.
&&
.IND WATCHES/WARNINGS/ADVISORIES...
Heat Advisory until 8 PM EDT Thursday for INZ021-028>031-035>049-
051>057-060>065-067>072.
&&
$$
AVIATION...Eckhoff
DISCUSSION...Eckhoff
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