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Climate reading

Dallas and the Chinese solar calendar

Dallas gets 261 freeze-free days a year, with a median first freeze on November 25. The calendar names a fortnight Frost’s Descent and opens it on 23 October. Rain and heat here move in opposite directions (r = -0.4), where the calendar’s home climate has them arriving together (r = 0.88). Advice built on hot-and-wet does not describe this place.

The station this page reads from

Weather stationDFW Intl, TX
Station IDUSW00003927
Freeze-free days / year261
Median first freezeNovember 25
Median last freezeMarch 8
Rain vs. heatr = -0.4 (inverted)
Normals period1991–2020

NOAA NCEI 1991–2020 U.S. Climate Normals. A normal is a thirty-year average, not a forecast and not any single year’s weather.

Right now

Rain and heat across the whole year

The classical calendar assumes rain and heat arrive together — across the 24 fortnights the prototype's rainy days and temperature run together (r = 0.88). Where you are they run opposite (r = -0.40): your rainiest fortnights are your coldest. Every piece of seasonal advice built on 'damp heat' lands differently here.

Where the calendar is most wrong about Dallas

Of the twenty-four fortnights, these four are the ones whose name or advice sits furthest from what Dallas’s weather station actually recorded over thirty years.

Frost's Descent 霜降from 2026-10-23

Pentads: 豺祭兽 · 草木黄落 · 蛰虫咸俯

containment and levelling (容平 róng píng). Go to bed early and rise early, up with the rooster.

This is the response to autumn qi — the way of nourishing the gathering-in (養收). Going against it is said to injure the lung, so that winter brings undigested diarrhoea and there is less to carry the storing.

Su Wen, 'Four Qi Regulate the Spirit' (素問·四氣調神大論); pentads from the Yue Ling Qi Shi Er Hou Ji Jie

Average / low / high62.3°F / 51.8°F / 72.8°F
Days with measurable rain22.9%
Days at or below freezing0.5
Daylight11h 03m (-29 min from two weeks ago)
  • This fortnight's advice was written for a place averaging 53.4°F at this point in the year. At DFW Intl, TX the 1991–2020 average is 62.3°F — warmer by 8.9°F.
  • 'Frost's Descent' is a phenological marker from the Yellow River valley — what observers saw, not a temperature threshold. The nearest thing your own record has to it: at DFW Intl, TX the first freeze of autumn has arrived by November 25 in half of years — 33 days after this fortnight begins. This fortnight typically carries about 0.5 days at or below freezing.
  • This is the fastest-cooling fortnight of your year: 5.9°F below the one before it.

If Yin deficiency came out high for you. Traditional theory associates Yin deficiency with internal dryness and a sense of heat from within. That is a theoretical association drawn from the classical literature, not a research finding. Your average high this fortnight is 72.8°F, and 22.9% of days typically see measurable rain. Whether any of it matters for you is something to observe, not something this page can tell you.

White Dew 白露from 2026-09-07

Pentads: 鸿雁来 · 元鸟归 · 群鸟养羞

Same seasonal passage as above — the classical text gives one instruction per season, not one per fortnight.

Average / low / high78.9°F / 69.0°F / 88.9°F
Days with measurable rain17.7%
Days at or below freezing0.0
Daylight12h 37m (-30 min from two weeks ago)
  • This fortnight's advice was written for a place averaging 68.5°F at this point in the year. At DFW Intl, TX the 1991–2020 average is 78.9°F — warmer by 10.4°F.
  • 'White Dew' is a phenological marker from the Yellow River valley — what observers saw, not a temperature threshold. The nearest thing your own record has to it: at DFW Intl, TX the first freeze of autumn has arrived by November 25 in half of years — 79 days after this fortnight begins. This fortnight typically carries about 0.0 days at or below freezing.

If Yang deficiency came out high for you. Traditional theory associates Yang deficiency with feeling the cold sooner than the people around you. That is a theoretical association drawn from the classical literature, not a research finding. Your average low this fortnight is 69.0°F, and about 0.0 days typically fall to freezing or below. Whether any of it matters for you is something to observe, not something this page can tell you.

Grain Buds 小满from 2026-05-21

Pentads: 苦菜秀 · 靡草死 · 麦秋至

flourishing and blooming (蕃秀 fán xiù). Go to bed late and rise early; do not resent the long day.

This is the response to summer qi — the way of nourishing growth (養長). Going against it is said to injure the heart, so that autumn brings intermittent fevers and there is less to carry the gathering-in.

Su Wen, 'Four Qi Regulate the Spirit' (素問·四氣調神大論); pentads from the Yue Ling Qi Shi Er Hou Ji Jie

Average / low / high77.8°F / 68.3°F / 87.4°F
Days with measurable rain27.3%
Days at or below freezing0.0
Daylight13h 58m (+24 min from two weeks ago)
  • This fortnight's advice was written for a place averaging 72.3°F at this point in the year. At DFW Intl, TX the 1991–2020 average is 77.8°F — warmer by 5.5°F.
  • This is the fastest-warming fortnight of your year: 4.9°F above the one before it.

If Damp-heat came out high for you. Traditional theory associates Damp-heat with damp and heat arriving together, rather than either one alone. That is a theoretical association drawn from the classical literature, not a research finding. This fortnight runs to an average high of 87.4°F with rain on about 27.3% of days. Whether any of it matters for you is something to observe, not something this page can tell you.

Major Cold 大寒from 2026-01-20

Pentads: 鸡乳 · 征鸟厉疾 · 水泽腹坚

closing and storing (閉藏 bì cáng). Go to bed early and rise late — wait for the sunlight. Leave the cold, stay near warmth, and do not let the skin sweat open.

This is the response to winter qi — the way of nourishing the storing (養藏). Going against it is said to injure the kidney, so that spring brings weakness and collapse and there is less to carry the bringing-forth.

Su Wen, 'Four Qi Regulate the Spirit' (素問·四氣調神大論); pentads from the Yue Ling Qi Shi Er Hou Ji Jie

Average / low / high47.2°F / 36.7°F / 57.7°F
Days with measurable rain22.1%
Days at or below freezing4.7
Daylight10h 17m (+14 min from two weeks ago)
  • This fortnight's advice was written for a place averaging 34.0°F at this point in the year. At DFW Intl, TX the 1991–2020 average is 47.2°F — warmer by 13.2°F.
  • 'Major Cold' is a phenological marker from the Yellow River valley — what observers saw, not a temperature threshold. The nearest thing your own record has to it: at DFW Intl, TX the last freeze of spring does not clear until March 8, still 47 days off. This fortnight typically carries about 4.7 days at or below freezing.

If Qi stagnation came out high for you. Traditional theory associates Qi stagnation with mood that moves with the season; the classical texts tie autumn's gathering-in to it in particular. That is a theoretical association drawn from the classical literature, not a research finding. Daylight at your latitude is 10h 17m, up 14 minutes from two weeks ago. Whether any of it matters for you is something to observe, not something this page can tell you.

All twenty-four fortnights at Dallas

Fortnight BeginsAvg °FRainy days %Freezing daysvs. calendar °F
Minor Cold小寒2026-01-0545.922.15.1+12.8
Major Cold大寒2026-01-2047.222.14.7+13.2
Start of Spring立春2026-02-0449.623.33.0+11.3
Rain Water雨水2026-02-1852.925.32.8+10.1
Awakening of Insects惊蛰2026-03-0557.125.40.9+9.1
Spring Equinox春分2026-03-2061.423.60.7+7.6
Pure Brightness清明2026-04-0564.923.70.0+6.1
Grain Rain谷雨2026-04-2068.326.50.0+3.7
Start of Summer立夏2026-05-0572.928.00.0+5.3
Grain Buds小满2026-05-2177.827.30.0+5.5
Grain in Ear芒种2026-06-0581.524.90.0+5.0
Summer Solstice夏至2026-06-2183.820.40.0+4.8
Minor Heat小暑2026-07-0785.615.10.0+5.5
Major Heat大暑2026-07-2386.913.70.0+5.6
Start of Autumn立秋2026-08-0786.216.60.0+7.9
End of Heat处暑2026-08-2383.318.40.0+8.5
White Dew白露2026-09-0778.917.70.0+10.4
Autumn Equinox秋分2026-09-2373.818.00.0+9.9
Cold Dew寒露2026-10-0868.221.60.0+9.2
Frost's Descent霜降2026-10-2362.322.90.5+8.9
Start of Winter立冬2026-11-0756.821.21.1+10.2
Minor Snow小雪2026-11-2252.020.82.3+11.4
Major Snow大雪2026-12-0748.321.23.9+12.0
Winter Solstice冬至2026-12-2246.121.64.0+12.3

‘vs. calendar’ is this fortnight’s local average minus the average where the calendar was written. Rain figures on this page count rainy days, not inches. The two can point opposite ways — summer storms drop more water on fewer days.

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