Cricket Weather Rules: Rain, Bad Light, and When Play Stops

Cricket is uniquely vulnerable to weather interruptions because it is played in the open air on a surface that is fundamentally changed by rain. No other major sport is so comprehensively affected by precipitation — a single morning's rain can change the entire character of a five-day Test match.

Rain Stops Play: The Umpires' Decision

When rain falls during a cricket match, the two on-field umpires consult and decide whether play should stop. They consider the safety of players (wet outfield makes diving dangerous), the condition of the pitch (rain affects the surface and must not be allowed to damage it unduly), and the severity of rain. Once the decision to leave the field is made, the ground staff cover the pitch, and the umpires monitor conditions from the pavilion. For Test matches, there is no minimum overs requirement to start — matches can resume whenever conditions are considered safe.

Bad Light: Protecting the Batting Side

Bad light is offered to the batting side (not the bowling side) as a protection from fast bowling in poor visibility. The batting captain can accept or reject the offer. If accepted, play stops until light improves. However, play can continue if the batting side elects to stay on in bad light — sometimes captains accept bad light to protect wickets, particularly late in a day or in difficult match situations. Spin bowling can continue in conditions where fast bowling would not be allowed.

The Duckworth-Lewis-Stern (DLS) Method

DLS (Duckworth-Lewis-Stern method) is the mathematical formula used to set revised targets in rain-affected limited-overs matches. It was developed by statisticians Frank Duckworth and Tony Lewis and adopted by the ICC in 1999, replacing the 'highest scoring overs' method. DLS calculates how many 'resources' (combination of wickets remaining and overs remaining) each team has used and sets a proportional revised target. Srinivas Jayadevan later improved the formula (adding 'Stern' to the name in 2014).

DLS in Practice

If Team A bats first and makes 280 in 50 overs, then rain reduces Team B's innings to 40 overs, DLS calculates what Team A would have scored if they had only 40 overs and proportionally adjusts Team B's target. A team's DLS target might be 240 in 40 overs. Crucially, DLS is not simply 'pro-rated': having more wickets in hand is worth more toward the end of an innings. A team with 5 wickets and 10 overs has more resources than a team with 5 wickets and 10 overs but 8 wickets down.

Pitch Covers and Controversies

Test match pitches must be covered during rain and at night. However, covering was not mandatory throughout cricket history — uncovered pitches in the 1970s and earlier created 'sticky dog' (wet then drying) conditions that made batting almost impossible. England's Jim Laker famously took 19 wickets in a 1956 Test partly on an uncovered pitch that dried unevenly. The transition to covered pitches in Test cricket in the late 1970s reduced the influence of conditions and is credited with improving batting averages dramatically.