Haryana straddles the boundary between the semi-arid northwest and the wetter Gangetic plains. Monsoon onset typically occurs 1–8 July, with northeastern districts (Ambala, Panchkula, Yamunanagar) receiving considerably more rainfall than arid western districts (Hisar, Sirsa). Winter western disturbances are critical for the Rabi wheat and mustard crops. For live maps, open VayuMet.
| District / City | Day 1–2 (mm) | Day 3–4 (mm) | Day 5–7 (mm) | Confidence |
|---|---|---|---|---|
| Gurugram | 0–3 | 1–7 | 3–15 | Moderate |
| Faridabad | 0–4 | 1–8 | 3–16 | Moderate |
| Ambala | 1–6 | 3–12 | 5–22 | Moderate |
| Panchkula | 2–7 | 3–13 | 5–24 | Moderate |
| Yamunanagar | 2–7 | 3–12 | 5–22 | Moderate |
| Karnal | 0–4 | 1–8 | 3–16 | Moderate |
| Panipat | 0–3 | 1–7 | 3–14 | Moderate |
| Sonipat | 0–3 | 1–7 | 3–14 | Moderate |
| Rohtak | 0–3 | 1–6 | 2–12 | Low–Moderate |
| Hisar | 0–2 | 0–5 | 2–10 | Low–Moderate |
| Sirsa | 0–2 | 0–4 | 1–9 | Low |
| Bhiwani | 0–2 | 0–5 | 1–10 | Low–Moderate |
| Mahendragarh | 0–3 | 1–6 | 2–11 | Low–Moderate |
| Rewari | 0–3 | 1–6 | 2–12 | Moderate |
| Nuh (Mewat) | 0–4 | 1–7 | 3–14 | Moderate |
2026 National Context: IMD's April 2026 LRF projects below-normal rainfall at 92% of LPA nationally (El Niño influence). However, northwest India including Haryana historically shows among the least sensitivity to El Niño for monsoon rainfall — the Bay of Bengal branch that recurves across the Gangetic plains is Haryana's primary moisture source, not the Arabian Sea branch most suppressed by El Niño. Haryana's 2026 JJAS outlook is near-normal. The early Kerala onset (~26 May) implies Haryana onset around 1–5 July, approximately 3–4 days ahead of climatological mean.
Haryana lies at the northwestern periphery of the Indian southwest monsoon. Eastern Haryana (Faridabad, Palwal, Nuh, Sonipat) receives the monsoon 2–4 days earlier than western districts. The state average rainfall of ~540 mm masks enormous east-west gradients: Ambala and Panchkula in the northeast receive 800–900 mm annually due to Shiwalik orographic enhancement, while Hisar, Sirsa, and Fatehabad in the west receive only 300–380 mm — resembling semi-arid Rajasthan rather than the Gangetic plains.
GFS consistently underestimates orographic rainfall along the Shiwalik foothills in Panchkula, Yamunanagar, and Ambala. During active monsoon spells, daily totals in these districts can reach 60–100 mm while GFS forecasts only 20–40 mm. Adjust expectations upward for these districts during monsoon active phases.
Western disturbances are Mediterranean-origin extra-tropical cyclones that cross Iran, Afghanistan, and Pakistan before entering northwest India. They bring winter rainfall to Haryana (and snowfall to the hills immediately north) that is critical for the Rabi season wheat and mustard crop. Haryana typically sees 5–8 significant western disturbance events per winter season. GFS is highly skilful at tracking these 3–5 days in advance — use VayuMet's 500 hPa wind layer to monitor trough positions over northwest India.
Haryana's rainfall distribution divides into three distinct zones: