Punjab is the last major state to receive the southwest monsoon — onset typically occurs 5–8 July. Winter rainfall from western disturbances (November–March) is critical for the Rabi (wheat) crop and is well-tracked by GFS. For live maps, open VayuMet.
| District / City | Day 1–2 (mm) | Day 3–4 (mm) | Day 5–7 (mm) | Confidence |
|---|---|---|---|---|
| Amritsar | 0–3 | 1–6 | 3–14 | Moderate |
| Ludhiana | 0–3 | 1–6 | 3–14 | Moderate |
| Chandigarh (UT) | 1–5 | 2–8 | 4–16 | Moderate |
| Jalandhar | 0–3 | 1–6 | 3–12 | Moderate |
| Patiala | 0–3 | 1–7 | 3–15 | Moderate |
| Bathinda | 0–2 | 0–5 | 2–10 | Low–Moderate |
| Gurdaspur | 1–5 | 2–8 | 4–16 | Moderate |
| Pathankot | 2–8 | 3–12 | 5–20 | Moderate |
2026 National Context: While IMD's April 2026 LRF projects below-normal rainfall at 92% of LPA nationally (El Niño suppressing), northwest India including Punjab is historically among the least El Niño-sensitive regions for monsoon rainfall. Punjab's 2026 JJAS outlook is near-normal. The 2026 Kerala onset (~26 May, 5 days early) implies Punjab onset around 1–3 July — approximately 4 days earlier than the climatological mean.
Punjab is at the northwesternmost extent of the Indian southwest monsoon. Onset typically occurs 5–8 July with a wide variability (±10 days). The monsoon brings most of Punjab's summer rainfall — about 400–450 mm over the July–September period. Northwest India receives moisture primarily from the Bay of Bengal branch after it recurves across the Gangetic plains — this pathway is less suppressed by El Niño than the Arabian Sea branch, supporting a near-normal 2026 outlook for Punjab.
Note that GFS commonly underestimates pre-onset monsoon moisture surges along the Shiwalik foothills (Gurdaspur, Pathankot, Rupnagar) where orographic enhancement can push daily totals to 60–80 mm during active spells.
For Punjab's critical Rabi crop (wheat, mustard), the winter western disturbances are as important as the monsoon. These are Mediterranean-origin extra-tropical systems that bring widespread rainfall and snowfall to the northwest Himalayas, with associated rainfall over Punjab and Haryana plains. GFS is highly skilful at tracking western disturbances 3–5 days in advance — use VayuMet's 500 hPa wind and rainfall layers to monitor their passage.