Farming near the Andes

There are many climates throughout the sierra, so it really depends on what sort of farm you want at what sort of temperature/elevation.  The rainy season (for me Nov - Apr/May) is during the "summer" for most of the country, but that is because the dry season (right now) is during the winter (most of Ecuador is below the equator).  At my property it has rained once in the last 2 months and that was a light rain for about 20 minutes.  There are areas where precipitation is more common even during the dry season, but they tend to either be in the orient (rainforest area) or in very high elevations where it is often cold and foggy (cloud-level).  However, there are a ton of microclimates which means you could find a specific property that gets more or less rain, but it would be difficult to know that without being intimately familiar with a region.

Important to note: In the rural sierra almost everyone is a "farmer" since there isn't enough flat land for industrial scale farming.  As such, the largest farms in my area are usually a hectare or two, since that's about as much contiguous quasi-flat/plantable land as you can find. Cattlemen/ranchers can have larger tracts, but they just let the cattle/goats/sheep roam mountainside which is too steep for much other use.

@sebastian9211

There is not much rainfall during the summer months, but the dew is on the ground every morning due to temp change. 

Until recently I lived in Cotopaxi Province only about a kilometer from the Pan America Highway but about 15 minutes from the larger city of latagunga. Elevation was about 3,000 m and generally the daytime was relatively warm with strong sunshine and temperatures of 22 to 25 Celsius although the evening was cool, often going down as low as three or four Celsius depending on the time of year. As a result this is an area with almost no nasty insects, not liking the cold at night. It is an area that is relatively dry but where I lived people did one of two things; they either had their own well and then did irrigation or they belong to a group irrigation organization which is what I did. For an initial fee of $1,000 to join the group I then got two times a week service for 5 hours using sprinklers which came on automatically organized by the group. For me the cost was $12 a month but depending on the size of your property it could be more.

This particular area grows a lot of alfalfa and one neighbour is extremely good getting something like seven crops a year.  Broccoli as a large-scale commercial crop is also grown outside and turned over several times a year . In my case I grew outdoor vegetables of many kinds but for warmer types like tomatoes and peppers I had a small Greenhouse. Plus I had a plantation of lavender for essential oil and also bees. Lots of people in the area maintain some dairy cattle, some sheep, alpacas or llamas, chickens, ducks, geese, cuyes, rabbits. There were also quite a few large scale flower greenhouses and also commercial enterprises for production of eggs.

Production was possible year round although there are a couple of times we might have a touch of Frost but nothing like North America as this only just burns a few leaves. Does not kill the plants. Much depends on what it is you're trying to do. For example being self-sufficient is close to possible, but to make serious money you need either a very high value product like the greenhouses produce or something unique. In my area there was also a very special horse operation raising Spanish horses and these are expensive.