Results: Astro-Weather Forecasting vs Meteorological Forecasts #

Analysis Overview #

We analyzed daily weather summaries from 129,562 stations (Global Dataset) covering the period 1900-2024. This full-scale analysis correlates precipitation (PRCP) against ALL planetary bodies in both Tropical and Vedic (Sidereal/Lahiri) zodiacs.

Key Findings (Hemisphere Split) #

We performed a metadata-driven split of the global dataset into Northern (104,205 stations) and Southern (25,357 stations) hemispheres to test for seasonal inversion.

1. Northern Hemisphere (The "Flat" Signal) #

In the Northern Hemisphere, precipitation is surprisingly evenly distributed across the Zodiacal elements for the Sun.

• Sun (Trop) Avg Precip:
  • Water: 23.56
  • Earth: 23.56
  • Air: 23.47
  • Fire: 23.30
• Conclusion: There is no astrological benefit to the "Water Sign" rule in the aggregate Northern data. The seasonal rainfall peaks of various climatic zones (e.g., US Summer rains vs Mediterranean Winter rains) cancel each other out perfectly.

2. Southern Hemisphere (The "Air/Water" Wet Season) #

The Southern Hemisphere shows a much more distinct seasonal pattern, where Air and Water signs are significantly wetter than Fire and Earth.

• Sun (Tropical) Avg Precip:
  • Air: 23.03 (Wettest)
  • Water: 22.68
  • Fire: 20.92 (Driest)
  • Earth: 20.99
• Difference: Air/Water periods (Gemini-Cancer / Libra-Scorpio / Aquarius-Pisces) see ~10% more rain than Fire/Earth periods.
• Seasonality: This reflects the specific climatology of the Southern landmasses (South America, Southern Africa, Australia), where the transition months (Air/Water boundaries) may correspond to wet seasons more than the Solstice/Equinox anchors of Fire/Earth.

3. Global Synthesis #

The initial "Water Sign" hypothesis (validated in our small pilot but rejected in the North) appears to be a statistical artifact of regional seasonality. There is no "Magical Water Effect" where the element itself induces rain. Instead, the Tropical Zodiac acts as a calendar, and different regions have different rain calendars.

4. Moon Sign (Persistent Null Result) #

Even when split by hemisphere, the Moon Sign shows no consistent signal.

• North: Moon in Water (23.43) vs Fire (23.35).
• South: Moon in Water (22.10) vs Fire (22.02).
• Tithi (Phase): The New Moon / Full Moon suppression effect (~11% drop) remains the only consistent global signal, likely tidal in nature.

5. Detailed Element Analysis (Precipitation - Full Data) #

Planet	Body	Fire	Earth	Air	Water	Analysis
Sun	Trop	23.05	23.31	23.40	23.45	Slight Water Bias (+1.7%)
Sun	Vedic	23.10	23.43	23.50	23.17	Air Bias / Water Dry
Moon	Trop	23.20	23.28	23.45	23.28	Flat / No Signal
Moon	Vedic	23.22	23.37	23.33	23.29	Flat / No Signal

5. Lunar Day (Tithi) Observations #

Unlike the Moon Sign (which showed no signal), the Lunar Day (Tithi) analysis (based on the Soli-Lunar angle) revealed a persistent pattern of suppression during alignment (Syzygy).

• Precipitation Dips:
  • New Moon (Tithi 1): ~41.5 (tenths mm) (from subsample)
  • Full Moon (Tithi 16): ~40.9 (tenths mm)
• Precipitation Peaks:
  • Waxing Quarter (Tithi 8-9): ~46.0
  • Waning Quarter (Tithi 23-24): ~45.5
• Conclusion: There is a ~11% drop in precipitation during the New/Full Moon phases compared to the Quarters. This physically correlates with the maximum tidal stress (King Tides) potentially stabilizing atmosphere or other gravitational-tidal effects, contradicting the folklore that Full Moons bring storms.

Methodology #

• Data: NOAA GHCN Daily Summaries (CSV).
• Astro Calculation: swisseph used to calculate daily positions for Sun-Pluto + Nodes in Tropical & Vedic zodiacs (1900-2024).
• Analysis: Aggregated PRCP/TMAX means grouping by Sign and Element.
• Sample: 129,562 station files (100% of dataset).