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ClimateQuiet 8d · day 8

Climate Central: October nights warming across 93% of U.S. cities

Analysis of 246 cities finds nighttime temperatures in October have warmed 3.4°F on average since 1970, with some regions seeing much steeper rises.

newest coverage 8d agosummary written 6d ago2 pieces331 likes & upvotes5 comments MastodonBluesky

What to know

  • October nights have warmed in 93% of 246 U.S. cities analyzed since 1970, averaging 3.4°F increase.
  • Climate change is identified as the primary driver of fall warming, extending risks from heat illness, wildfires, and allergies.
  • Regional variation is stark: Northeast cities warmed most on average (+4.1°F), while western cities like Reno saw increases exceeding +11°F.
  • Warmer falls are shifting conditions that trigger fall color and seasonal allergies like ragweed pollen, affecting 50 million Americans.

Climate Central Research organizationZack Labe Researcher sharing findings

Climate Central: October nights warming across 93% of U.S. cities
climatecentral.org

How it unfolded 1 development · click the chart to see its coverage posts

Peak 2 pieces in two hours at Oct 31, 8 AM; 2 pieces over 8 days (2 posts) Oct 31, 8 AM — 2 pieces · 2 posts — Bluesky 1, Mastodon 1Oct 31, 10 AM — quietOct 31, 12 PM — quietOct 31, 2 PM — quietOct 31, 4 PM — quietOct 31, 6 PM — quietOct 31, 8 PM — quietOct 31, 10 PM — quietNov 1, 12 AM — quietNov 1, 1 AM — quietNov 1, 3 AM — quietNov 1, 5 AM — quietNov 1, 7 AM — quietNov 1, 9 AM — quietNov 1, 11 AM — quietNov 1, 1 PM — quietNov 1, 3 PM — quietNov 1, 5 PM — quietNov 1, 7 PM — quietNov 1, 9 PM — quietNov 1, 11 PM — quietNov 2, 1 AM — quietNov 2, 3 AM — quietNov 2, 5 AM — quietNov 2, 7 AM — quietNov 2, 9 AM — quietNov 2, 11 AM — quietNov 2, 1 PM — quietNov 2, 3 PM — quietNov 2, 5 PM — quietNov 2, 7 PM — quietNov 2, 9 PM — quietNov 2, 11 PM — quietNov 3, 1 AM — quietNov 3, 3 AM — quietNov 3, 5 AM — quietNov 3, 7 AM — quietNov 3, 9 AM — quietNov 3, 11 AM — quietNov 3, 1 PM — quietNov 3, 3 PM — quietNov 3, 5 PM — quietNov 3, 7 PM — quietNov 3, 9 PM — quietNov 3, 11 PM — quietNov 4, 1 AM — quietNov 4, 3 AM — quietNov 4, 5 AM — quietNov 4, 7 AM — quietNov 4, 9 AM — quietNov 4, 11 AM — quietNov 4, 1 PM — quietNov 4, 3 PM — quietNov 4, 5 PM — quietNov 4, 7 PM — quietNov 4, 9 PM — quietNov 4, 11 PM — quietNov 5, 1 AM — quietNov 5, 3 AM — quietNov 5, 5 AM — quietNov 5, 7 AM — quietNov 5, 9 AM — quietNov 5, 11 AM — quietNov 5, 1 PM — quietNov 5, 3 PM — quietNov 5, 5 PM — quietNov 5, 7 PM — quietNov 5, 9 PM — quietNov 5, 11 PM — quietNov 6, 1 AM — quietNov 6, 3 AM — quietNov 6, 5 AM — quietNov 6, 7 AM — quietNov 6, 9 AM — quietNov 6, 11 AM — quietNov 6, 1 PM — quietNov 6, 3 PM — quietNov 6, 5 PM — quietNov 6, 7 PM — quietNov 6, 9 PM — quietNov 6, 11 PM — quietYesterday, 1 AM — quietYesterday, 3 AM — quietYesterday, 5 AM — quietYesterday, 7 AM — quietYesterday, 9 AM — quietYesterday, 11 AM — quietYesterday, 1 PM — quietYesterday, 3 PM — quietYesterday, 5 PM — quietYesterday, 7 PM — quietYesterday, 9 PM — quietYesterday, 11 PM — quietToday, 1 AM — quietToday, 3 AM — quietToday, 5 AM — quietToday, 7 AM — quietToday, 9 AM — quiet ◂ 1 earlier
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  1. 1

    Warming prolongs fall health and environmental risks

    Climate Central notes that warmer fall seasons extend risks from heat-related illness, wildfires, allergies, and mosquitoes. About 50 million Americans are allergic to ragweed pollen, which peaks in fall, and conditions triggering fall color are shifting, potentially disrupting ecological and economic value of foliage.

    “October nights have warmed in 93% of 246 U.S. cities analyzed — by 3.4°F on average since 1970.”
    — Climate Central · source
    • zacklabe.com

      Now here is something scary... 👻 And some more spooky climate trends for today: www.climatecentral.org/climate-matt... #HappyHalloween! 🎃

      zacklabe.comBluesky8d ago254▲view on Bluesky ↗
    1 more of the top 2 · 2 posts in this stretch
    • ZLabe@fediscience.org

      Now here is something scary... 👻 And some more spooky climate trends for today: https://www. climatecentral.org/climate-mat ters/october-nights-warming-us-cities # HappyHalloween ! 🎃

      ZLabe@fediscience.orgMastodon8d ago77▲view on Mastodon ↗
    all of them →
  2. background

    Regional disparities emerge in October warming trends — The analysis reveals significant regional variation, with Northeast cities warming most on average (+4.1°F), and western cities like Reno, Nevada experiencing the largest increases (+11.9°F since 1970). Five cities led warming: Reno, NV; El Paso, TX; Las Vegas, NV; Tyler, TX; and New Orleans, LA.

  3. background

    Climate Central analyzes October night warming across U.S. cities — Climate Central released analysis of October minimum temperature data from 246 major U.S. cities spanning 1970 to 2025, finding that October nights have warmed in 93% of cities analyzed by an average of 3.4°F. Climate change is cited as the leading cause of fall warming.

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